What is Mode $06? (Solution)

Mode $06 is an advanced diagnostic functionality mode included as part of the On-Board Diagnostic standard (OBD2). It keeps track on how emission control components and other systems and sensors are functioning. Mode $06 allows access to the results for on-board diagnostic monitoring tests of these systems.

What is mode $06 on a scanner?

  • Consequently, many older scan tools lacked the capability to access and display Mode $06 data. But as time went on, some very tech-savvy technicians discovered that Mode $06 contained a plethora of useful diagnostic information. It turned out to be the ultimate of diagnostic information — provided you can figure out how to read and use it.

What is Mode $09?

Mode $09— Request vehicle information. The purpose of Mode $09 is to allow a scan tool access to the vehicle identification number and calibration numbers from all emissions-related electronic modules.

What is a mode 6 diagnosis?

Mode 6 is defined as test results and other component/system monitoring. The vehicle runs self tests on its various systems and components to determine everything is running within the operational standard. Mode 6 is where the engine computer stores all of the results from these tests.

Why does some Mode $06 data need to be translated into plain English?

The “$” symbol means the data is in hex code, not ordinary decimal numbers. Fact that Mode $06 data is in hex code means it has to be converted into familiar decimal values for us to understand it. This requires some math and conversion factors, or scantool software that can do the translation for you.

What is TID and CID?

* ‘ TID’ stands for Test identification. This is the sensor or component that is being monitored on that line. * ‘CID’ stands for Component identification. This is the test result for that sensor or component.

Should I clear fault codes?

Erasing error codes deletes the errors from the computer. In doing so, you lose the information that would help solve a problem with the car, so you shouldn’t erase them unless the problem has been corrected.

What does PID mean in automotive?

OBD-II PIDs ( On-board diagnostics Parameter IDs ) are codes used to request data from a vehicle, used as a diagnostic tool.

What modes are available using Mode $06?

Mode $06 monitors

  • Exhaust Gas Sensor Monitor.
  • Catalyst Monitor.
  • EGR Monitor.
  • VVT Monitor.
  • EVAP Monitor.
  • Exhaust Gas Sensor Heater Monitor.
  • Heated Catalyst Monitor.
  • Secondary Air Monitor.

Can you drive with OBD plugged in?

Absolutely, sometimes it is required. Some insurance company’s offer an obdII device that stays plugged in all the time and sends them information about your style of driving.

What does diagnostic mode mean?

Diagnostics Mode can be used to change your device’s radio band & modem settings and other stuff like changing IMEI address or MAC Address, if you have appropriate software like DFS CDMA Tool or QPST. You can enable it only if your phone is rooted.

What are the 10 obd2 modes?

There are 10 OBDII scan tool modes.

  • Mode $01. When you enter this mode, you are telling the PCM/ECM to provide current live powertrain data values.
  • Mode $02. When you enter this mode, you are telling the PCM/ECM to provide you with freeze frame data.
  • Mode $03.
  • Mode $04.
  • Mode $05.
  • Mode $06.
  • Mode $07.
  • Mode $08.

Which operating mode of the OBD II system shows current data?

Mode $02 provides the data stored at the time the fault was detected by the OBD-II and when the OBD-II system turned on the MIL. Mode $02 output only shows the data from when the code set or matured and caused the MIL.

Using OBD2 Mode $06 for advanced car diagnostics

Editor’s note: This item was updated in March 2020 to reflect the most recent facts and to ensure accuracy.

What is Mode $06?

Mode $06 is a diagnostic functionality mode with advanced diagnostic capabilities that is incorporated as part of the On-Board Diagnostic standard (OBD2). It maintains track of the operation of emission control components, as well as other systems and sensors. On-board diagnostic monitoring tests for these systems are conducted in Mode $06, which provides access to the findings. Continuous monitoring of these systems or components (for example, misfire monitoring) or non-continuous monitoring of these systems or components are also possible (e.g.

Continuous monitors are those that operate all of the time, whereas non-continuous monitors are those that run just when specific circumstances are satisfied.

Mode 6 exposes the real self-test data that is utilized by the OBDII system to detect problems and to display the results of the readiness monitor test.

Read more: What is Mode $06? (Solution)

Mode $06 monitors

The following is a list of the On-Board Diagnostic Monitors that are currently described by the OBD2 standard. OBD Auto Doctor is compatible with all of them.

  • Monitors for the exhaust gas sensor, the catalyst, the EGR, the VVT, the EVAP, the exhaust gas sensor heater, the heated catalyst, the secondary air, the fuel system, the Boost Pressure Control, the NOx Adsorber, the NOx/SCR Catalyst, the Misfire Cylinder Data, and the PM Filter are all available.

As an alternative to these standard-defined displays, producers can instead use their own custom-designed monitors. However, our program will not be able to identify the monitors or tests since they are stored in the manufacturer-specific Mode $06 data set. It will provide you with the Monitor ID (OBDMID) and the Test ID (TID), as well as the values for the data. You’ll have to seek up the significance of things in the service manuals, or you may look them up on the Internet for further information.

How can Mode 6 help?

Depending on your degree of competence and experience with automobiles, the Mode 6 data can be beneficial in a variety of ways. The result and limit numbers, as well as the test outcome (pass/fail), will be provided by OBD Auto Doctor. If you are able to give the figures a more precise interpretation in the proper context, you may learn a great deal about the car’s internal workings and its performance. The information can be of use to you in the following ways, for example:

  1. You can identify growing problems before they result in the occurrence of an active error code. You can identify flaws that are generating runnability concerns but have not yet shown themselves as active errors
  2. For example, You can use the information to determine if a Diagnostic Trouble Code was established as a result of a big failure or as a result of a minor failure. You may check to see if the fixes you’ve made have truly resolved the issue at hand. You don’t have to sit around and wait for certain OBDII self-tests to complete, which might cause the Check Engine Light to illuminate.

Using Mode 6 data, you can eliminate a lot of uncertainty from the equation by removing components and systems from the equation. However, in order to get the most out of the data, you must have a basic understanding of how the engine operates.

Example: Engine Misfires

The misfire checking feature is considered by many technicians to be the most important feature of the Mode $06. Every time a cylinder misfires, the system adds another misfire to the total number of misfires for that cylinder. A misfire issue code will be generated only if the total number of misfires exceeds a predetermined threshold. If the number of misfires does not exceed the maximum, no issue code is generated, and no notification is sent to you. However, you may still be able to feel the misfire if the engine is under a lot of strain or while it is being accelerated.

To view a bigger version of this photograph, please click here.

In order to assist you in identifying which cylinders are now misfiring and which cylinders have been continuously misfiring in prior drive cycles, the misfire data is provided.

There isn’t an issue in this instance.

It indicates that the cylinder is behaving abnormally and that there is an issue with the ignition, fuel, or compression in that cylinder, respectively. Keep in mind that misfire numbers for each cylinder should only be evaluated in terms of how they compare to one another.

Final words

It was my goal with this essay to teach the fundamentals of the OBD2 Mode $06, popularly known as the On-Board Diagnostic Monitors. You should have received a clear introduction to these monitors and how they may be used for automobile diagnostics, if you read the text. Download the OBD Auto Doctor program for a PC or a Mac right now to get started evaluating your vehicle! Important: Please keep in mind that not all On-Board Diagnostic Monitor IDs and Test IDs are supported by all systems. The software is only capable of displaying the monitors and tests that are provided by the automobile.

Make use of the free edition of the program to discover what information your automobile can supply.

Mode $06 Explained in Detail

A professionalOBD2 scanner can easily scan Mode $06, which is one of nine diagnostic modes that are part of the OBD2 onboard diagnostics system included in all 1996 and newer automobiles. Mode $06 can be readily scanned with a professionalOBD2 scanner. Mode $06 was not intended to be used by technicians when it was first developed in its original form. According to the manufacturer, it was intended to be ‘hidden’ data that would be used by the OBD2 system to detect issues and configure fault codes.

  • Many earlier scan tools were therefore unable to access and show Mode $06 data as a result of this limitation.
  • In the end, it turned out to be the most comprehensive source of diagnostic information — assuming you can figure out how to understand and apply it.
  • When parts store staff do plug-in diagnostic tests on clients’ automobiles, they often utilize simple code fault readers or entry-level scanners, which are both less expensive than more expensive scanners.
  • However, even if you have a scanner that is capable of operating in Mode $06, it is unlikely that you would ever have the need to go so far into the on-board diagnostics.
  • Having said that, it’s beneficial to be familiar with Mode $06 and how a mechanic may utilize it to troubleshoot a Check Engine light that comes back on after repairs have been completed.

Mode $06 is frequently the key to fixing situations such as the following:

  • Identification of no-code driveability and emission defects
  • Identification of sensors and other components that are still working within permissible limits but are on the edge of failure
  • Reduction of comebacks affecting the catalytic converter
  • And Repairs to the EVAP system and the EGR system
  • Misfiring of the engine


Mode $06 data is information that the OBD2 system tracks and compiles on monitors that are not in continuous operation. There are hexadecimal codes (a base 16 number system that includes numbers 0 to 9 plus the letters A through F) in the table since that is the computer language that the PCM employs to handle things. The ‘$’ character indicates that the data is in hexadecimal format rather than regular decimal values. The fact that Mode $06 data is stored in hex code implies that it must be transformed into more familiar decimal numbers before we can make any sense of it.

  • A reference chart from the vehicle manufacturer is also required, which indicates which component or system test each line of code relates to, as well as the allowed range of results for that specific test.
  • For each line of data on OBD2 systems prior to the advent of Controller Area Network (CAN) electrical systems, there are two code identification tags to distinguish them.
  • Following that, the real test results are revealed.
  • It’s the same thing as before, but under a different name.

It is possible that the hex code TID and CID values will be translated into plain English (or Spanish) depending on the capabilities and software in the printer or scanner software you are using, followed by the hex code or decimal test results, the range of acceptable values for that particular test, the units of measure for that particular test (voltage, pressure, etc.), and aPASSorFAILindication will appear.

Modifications to the Mode $06 monitor tests that may be performed on a late-model Ford vehicle equipped with a CAN electrical system are listed below as an example: MID Oxygen sensorMID – $1.015 – Oxygen sensorMID – $02$03$02 – Oxygen sensorMID – $03 Oxygen sensorMID – $0.05 – 06 dollars for the oxygen sensorMID and 07 dollars for the oxygen sensorMID The Catalyst Monitor Midi costs $21.

The air injection monitor costs $71.

The misfire monitor costs $90.

The extra subtests of various components may be found inside each of these monitor tests.

In addition to the MID$31 EGR monitor, a CID$80 delta pressure upstream test for the differential pressure sensor (DPFE), a CID$81 delta pressure downstream test, a CID$84 delta pressure EGR leak check test, and a CID$85 delta pressure EGR flow test are also included under the MID$31 EGR monitor.

It is up to the vehicle manufacturer to establish what constitutes an acceptable range of test results for each CID. Cut points are then established in order to ensure that emissions regulations are followed.

Read further: What is Mode $06? (Solution)

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Unless and until all of the components that are being monitored and tested by the OBD2 system are found to be defective, no codes are created, and the Check Engine light does not illuminate. If a component fails a test, it is not always necessary for it to generate a code and illuminate the Check Engine indicator. In some cases, numerous failures from specific tests may be necessary before OBD2 will set a code. It also relies on whether or not the test has really run due to another issue preventing the test from being performed.

  • Why?
  • Due to a malfunctioning upstream or downstream oxygen sensor, the car is unable to compare before and after measurements in order to determine converter efficiency.
  • When evaluating Mode $06 data, it is critical to keep this in mind because a failure in one test may prevent subsequent tests from performing.
  • If it is close to the higher or lower limits of the permitted test range, it may be sufficient to cause a visible driveability or emissions problem to manifest itself.
  • It is possible that it is not defective enough to fail its CID tests, but it may be slow or biased enough to cause the air/fuel mixture to become unbalanced, leading in decreased fuel economy, poor throttle response, or an engine misfire.
  • If the test results are just inside the acceptable range, it would indicate that the sensor is most likely causing the problem and would fail shortly.


When OBD2 detects a problem that is caused by something else, it may assign a fault code to indicate that the problem exists. Lean fuel mixture codes, misfire codes, and catalyst efficiency codes are all included in this grouping. If the Check Engine light is illuminated, the car will not pass an OBD2 plug-in emissions test. It is necessary to read and clear the codes, diagnose the problem, and make the necessary fixes in order for all of the OBD2 monitors to operate and pass. Consider the following scenario: the vehicle failed an OBD2 plug-in emissions test due to a P0420 catalyst efficiency code.

  • Here’s how Mode $06 can be of use.
  • Afterwards, you may examine the results of the different CID tests performed on the upstream and downstream oxygen sensors to determine whether one or more of the sensors is sluggish or biased, which is impacting the test results.
  • It’s always a hassle when you get an EVAP code since EVAP issues can be complex and time-consuming to diagnose.
  • In this case, one may utilize Mode $06 to examine the results of the different EVAP component checks to see why a certain code may have been set.
  • Despite the fact that OBD2 runs a lengthy list of component self-tests, it is possible that a test limit is set too high or too low, resulting in codes being generated needlessly.
  • Vehicle manufacturers may change the limit and provide a new calibration that may be downloaded and put into the vehicle’s PCM, if necessary.

That is one of the many advantages of reflashing PCMs. It makes it simple to update calibration settings as they change (assuming you have a J2534 pass-through tool or a scan tool with flash capabilities).


Another item to be on the lookout for while reading Mode $06 data is TID/CID tests that contain out-of-date or erroneous information. Occasionally, Mode $06 will show misfire rates for cylinders that don’t exist in some Ford V6 applications. The misfire rates for cylinders 7 and 8 may be particularly high according to the CID test findings. In a V6, there are no cylinders 7 and 8, as you might expect. It’s a programming error that OBD2 overlooks since it’s busy monitoring misfires. However, if you are unaware of this, you may conclude that the engine has a misfire problem.

If the vehicle is not equipped with a certain sensor or component, erroneous data may be reported for the test result for that sensor or component.

It necessitates the use of an OBD2 scanner that can access and show the TID and CID test results, as well as the ability to comprehend the information provided.

Mode $06 is Detailed Explanation 4.5 (90.83 percent ) 24votes

What is Mode $06?

The OBDII diagnostic system has nine different modes. Mode $06 is one of the most effective for identifying issues. When the OBDII diagnostics system was being developed, the engineers came up with nine different modes.

More: What is Mode $06? (Solution)

Mode $01: Monitor Status and Current Data

Mode 1 provides information on the status of the rediness monitors. Each of the readiness monitors is related with a system or component on the vehicle that has an impact on emissions. Readiness monitors can be classified as either continuous or non-continuous in operation. The Comprehensive Component Monitor, the Misfire Monitor, and the Fuel Monitor are all examples of continuous monitors. Each and every one of the other readiness monitors is not continuous. Each readiness monitor performs a series of tests to evaluate the overall health of the system or component under consideration.

Mode $02: Freeze Frame

When a DTC is set in Mode 2, it is essentially a recording function that records the available data parameter I.D.s (PIDs) that exist in the ECM at the same time that the DTC is created. Mode 2 is similar to Mode 1. In the case of a misfire issue code, the freeze frame data can provide information about the RPM, engine load, fuel trims, and sensor readings that were in effect at the time the code was set.

Mode $03: Stored Diagnostic Trouble Codes

Mode 3 is merely a list of trouble codes that have been saved and that have caused the check engine or Malfunction Indicator Lamp to illuminate (MIL). It’s what the majority of consumers believe a scan tool is for. Once a code has been assigned, the ECM will proceed with the testing. If the continuous testing reveals that a code that had previously failed has now passed three consecutive tests, the ECM will switch off the MIL to prevent further failures.

The code will, however, continue to be retained in Mode 3 as a history code until it is deleted. The code will be removed from memory when a specified number of warm-up cycles have been completed without a recurrence.

Mode $05: Oxygen Sensor Monitor Test Results

Mode 5 holds the test results that the ECM has saved for the purpose of ensuring that the oxygen sensors are functioning properly.

Mode $06: Non-continuous Monitor Test Results

When a non-continuous monitor reaches the threshold for setting a fault code, Mode 6 displays a list of the individual tests and their results for each non-continuous monitor. Mode 6 is more user-friendly and helpful since most aftermarket service information systems contain the test identifications and descriptions, making it more accessible.

Mode $07: Continuous Monitor Test Results or pending codes

It is in Mode 7 that you will discover the records for issue codes for systems or components that have failed once and require a second failure in order to set the code. Mode 7 is also known as the ‘records’ mode. As a result, the fault code is effectively ‘pending,’ just waiting for a second failure to occur. Look up the freeze frame data for any pending codes you discover and then duplicate the driving circumstances to see if you can trigger a second failed attempt at the code.

Mode $08: Request Control Of Onboard Systems

Only the EVAP system is compatible with Mode 8 in OBDII, and even then, only on certain models. By shutting the canister vent valve, you may tell the EVAP system to close itself, allowing you to vacuum or pressurize test the system for leaks once it has completed its closure.

Mode $09: Vehicle Information

Among the information provided by Mode 9 is the vehicle identification number (VIN) as well as the ECM’s calibration information. This is critical information for determining whether or not the software in the car is up to current, among other things.

How to use Mode $06 information to get a diagnosis

Imagine that your automobile manufacturer demands a 500 misfire threshold on one cylinder before it will set an engine related misfire code on the engine. It is not operating properly, and you do not have a check engine light on, nor do you have any saved or pending fault codes on your computer. You should go to Mode $06 from there. Examine the data for each cylinder to determine which cylinders have misfires and how many misfires have been recorded in total. Mode $06 is used for a variety of purposes other than misfire codes.

Monitor for Exhaust Gas Sensors Catalyst Monitoring System EGR Monitoring System VVT Monitor (Variable Voltage Technology) EVAP Monitoring System Sensor for Exhaust Gas Heater Monitoring Monitor for the Catalyst that has been heated Air Quality Monitoring System (Secondary Air Monitor) Monitor of the Fuel System Monitor for Controlling Boost Pressure NOx Adsorber Monitoring System Catalyst Monitor for NOx/SCR Misfire Cylinder Information PM Filter Monitor (2019) is a program that monitors filters.

Rick Muscoplat is a professional musician.

Advanced Mode $06 Diagnostics

Are you as confident and efficient as you’d want to be when it comes to identifying driveability issues? How do you know if the components or fixes you installed were effective in resolving the issue? In many circumstances, Mode $06 can assist in determining whether or not a problem is now present as well as whether or not the repair was effective. Mode $06 may be utilized as a diagnostic resource, and we’ll look at how it can be used in this article. Mode $06 data is something that most technicians have at least heard of by now, but many may still be unsure of why it should be used.

The On-Board Diagnostic Second Generation (OBD II) standard introduced nine new diagnostic modes to the automotive industry.

For different testing of a monitored system, the vehicle manufacturer is responsible for assigning ‘Manufacturer Defined Test ID’s.’ In spite of many ignition OFF cycles, the most recent test values (results) are preserved indefinitely until they are replaced by more current test data (results).

  • Prior to the introduction of Mode $06, technicians were completely unaware of the decisions made within the powertrain control module (PCM) in order to assign diagnostic issue codes on the vehicle (DTCs).
  • Having access to Mode $06 data is like to having a window into the mind of the program engineer.
  • Page 66 displays an image of the Mastertech 3100 scan tool displaying Mode $06 data for a 1999 Toyota Tacoma, as well as the TIDs and CIDs that are currently accessible for this vehicle (see Fig.
  • You can notice right away that TID $01-CID $01 is marked as a failure.
  • The details of TID $01-CID $01 are shown in Fig.
  • 1a.
  • TID and CID definitions will need to be obtained from the Toyota service information in this situation.

Mode $06 data is reported as Monitor Identification (MID) and Test Identification (TI) by newer OBD II Controller Area Network (CAN)-equipped automobiles (TID).

It is advantageous to use a bigger monitor or computer screen since it allows all of the Mode $06 data to be presented on a single screen.

The most significant difference between earlier Mode $06 data and modern CAN Mode $06 data is that SAE updated the definition, unit conversion procedure, and scale conversion process for the latter.

This might make the data conversion process more difficult to understand.

Additional information may be found in the SAE HS 3000 On-Board Diagnostics for Light and Medium-Duty Vehicles Standards Manual if you need it.

Each car manufacturer utilizes a distinct format and location for their vehicle identification number.

When it comes to Mode $06 data, some of it is really thorough and valuable; in other situations, the charts are incomplete.

It’s possible that the diagnostic scan tool you’re using will perform a lot of the work for you.

During testing in the general mode, the TIDs and CIDs are not defined, and the test data are displayed in the raw format (see below).

3b depicts the identical car with the Mode $06 data translated for you by the computer.

After downloading the Mode $06 data with an OBD II generic scan tool and converting it to a different format, the next step is to locate the car manufacturer’s conversion data.

When it came to early Toyota/Lexus automobiles, the data was included in a single PDF page.

Figure 4 depicts a sample of the data for TID $01-CID $01 from the previous section.

The Unit Conversion column specifies how to convert the raw data into a different unit.

3a depicts the raw test result as 255, which indicates that the raw test value must be multiplied by.0039 in order to achieve the correct number of.994, as shown in the formula.

The conversion has no effect on the final findings, which were considered by the PCM to be incorrect since the Bank 1 Catalyst failed the specified test.

When a component or monitor has been repaired, the data from Mode $06 can be utilized as a baseline to assess if the component or monitor now passes the test.

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The malfunction indication light (MIL) was illuminated when the car was brought in.

As a result of previous experience, I was aware that Toyota gave Catalyst Monitor Mode $06 data.

1a, 1b, 3a, and 3b.

What occurs next is determined on the diagnostic technique you use.

Most stores will eventually come to the same conclusion, but in numerous instances, time and money have been wasted.Shop 1.

Because the DTC did not respond immediately, the technician advised that the wait-and-see strategy be used.

If the technician uses the same approach to check the DTC as before, he will get the same findings as previously.

In order to validate the problem, the technician did not follow the appropriate DTC enabling criteria sequence, as advised by the manufacturer.

Once all of the necessary circumstances are satisfied, the test will take roughly 20 seconds to complete.

Prior to the MIL turning on, there will be two failed trips.

Multiple driving cycles are an important consideration in this case: It makes no difference how long this vehicle is driven; the ignition switch must be switched off at least once before the second test may be performed.

The oxygen sensors sprang into action.

The technician used the same road test technique as before and the DTC did not appear, leading him to believe the problem had been resolved.


If the car had been given to the client, it would have returned within a short period of time.

5: After the O2 sensors were replaced, the DTCs and I M Readiness Monitors were cleared, as were the I M Readiness Monitors and DTCs.

The initial Mode $06 test is sufficient to raise the P0420 to the pending state.

This technician receives the DTC and does a Mode $06 data check, which validates that the fault is there.

To ensure that the repair was successful, the technician puts the vehicle through a driving test in accordance with the enabling criteria requirements.


All of the monitors have finished, and there are no pending DTCs to deal with.

When it comes to nearly everything detected by Mode $06, the technique followed by the technician in Shop 3 can be applied.

The main drawback is that the data is only available for a restricted number of automobiles.

Now, here’s a repair procedure that makes use of Mode $06 that you might not have thought of before.

In my opinion, the key is not to clear the DTCs using the scan tool, because doing so instantly resets the I M Readiness Monitors, which necessitates a significant amount of drive cycle time.

FIGURE 7A: Screen grab acquired from a 1999 Toyota Tacoma while using the Bosch KTS-570 diagnostic scan tool in the OBD II generic mode (Obd II generic mode).

This feature is not available on the majority of OBD II generic scan tools.

I was previously aware that the most recent catalyst Mode $06 test value had exceeded the test limitations, indicating that the problem was still present.

The DTC was successfully cleared.

7a, after 83 seconds of driving, TID $01-CID $01 increased from 0 to roughly 150, above the 128-second threshold.

Figure 7b depicts the results of the road test after the catalyst has been changed.

MIL should be activated in most circumstances once the PCM has detected two or three completed journeys when the test value is within acceptable limits.

Vehicles do not fail due to DTCs in most OBD II programs; instead, they fail due to a lighted MIL.

It is estimated that I would have spent roughly 30 minutes clearing the DTCs and I M Readiness Monitors, which would have allowed the vehicle to pass the state test.

Currently, Mode $06 is a work in progress, with improvements being made on a regular basis.

There are no boundaries to the utility of being able to establish a baseline for a failure before to repairs and to confirm that a test value is within limits once a repair is done.

Because each scan tool has its own set of options, you’ll need to choose one that gives the information and format that you want.

Mode $06 is one of numerous diagnostic options available to you that will assist you in solving problems more quickly, so give it a shot. Obtain a PDF version of this document.

OBD II Mode $06 Diagnostics

Are you as confident and efficient as you’d want to be when it comes to identifying vehicle driveability issues? Which components or repairs did you use to resolve the issue? How did you know they were successful? Mode $06 may often be used to determine whether or not an issue is currently present as well as whether or not the repair was effective in a short period of time. Mode $06 may be utilized as a diagnostic resource, and we’ll look at that in this post. Mode $06 data is something that most technicians have at least heard of by now, but many may still be unsure about its significance.

  1. There are nine diagnostic modes in the On-Board Diagnostic Second Generation (OBD II) standard.
  2. Creating ‘Manufacturer Defined Test ID’s’ for various tests on a monitored system is the responsibility of the vehicle manufacturer.
  3. I’m not sure what to make of this.
  4. With the use of an OBD II generic scan tool, the technician may verify the most recent test results for a variety of components and systems that are being monitored.
  5. Mode $06 data is reported as Test Identification (TID) and Component Identification (CI) by early OBD II automobiles (CID).
  6. 1a on page 66).
  7. In order to display the real test data, a tiny screen must be used.


To resolve this issue, the TID and CID definitions will need to be acquired from the Toyota service information database.

Modul $06 data is reported as Monitor Identification (MID) and Test Identification (TI) by newer OBD II Controller Area Network (CAN)-equipped automobiles (TID).

If you use a bigger monitor or computer screen, you will be able to see all of the Mode $06 data at once, which is convenient.

It is important to note that the SAE updated the definition, unit conversion procedure, and scaling conversion process between older Mode $06 data and modern CAN Mode $06 data.

Because of this, the data conversion process might be difficult to follow.

Additional information may be found in the SAE HS 3000 On-Board Diagnostics for Light and Medium-Duty Vehicles Standard Manual.

In terms of format and position, each car manufacturer is unique.

However, although in some circumstances the Mode $06 data is quite precise and informative, it is also lacking in others where the charts are lacking.

Some of the work may be completed by the diagnostic scan tool you are using.

The TIDs and CIDs are not defined in the general mode, and the test data are presented in the raw format.

3b depicts a similar vehicle, but with the Mode $06 data translated for you.

After retrieving the Mode $06 data with an OBD II generic scan tool, the next step is to locate the car manufacturer’s conversion data.

There was just one PDF document containing all of the information for early Toyota/Lexus automobiles.

FIGURE 4 depicts a sample of the data for TID $01-CID $01 from the previous section.

This column describes how to transform the raw data into a different unit of measurement.

3a depicts the raw test result as 255, which indicates that the raw test value must be multiplied by.0039 in order to achieve the real number of.994, as shown in Fig.

The upper limit is.499 dollars per transaction (128 x.0039).

The values may not need to be converted if you are familiar with the true meanings of TID and CID.

Examine the Toyota Tacoma from 1999 in further detail.

The P0420 (Catalyst System Efficiency Below Threshold) DTC was discovered when we looked for DTCs.

The data from the Catalyst Monitor is shown in Figs.

The findings of Mode $06 confirm that the failure is still active as of the most recent drive cycle, according to the results.

This problem has been approached in the following three ways, according to my observations.

Due to the fact that the DTC did not respond immediately, the technician advised taking a wait-and-see strategy.

If the technician uses the same process to validate the DTC as before, he will get the same outcome.

The following enabling criteria are met for this particular P0420 DTC: battery voltage, 11 volts; air temperature, 14°F; coolant temperature, 167°F; vehicle speed, 31 to 50 mph; engine speed, 3000 rpm; time in closed-loop, 20 seconds (while driving, not decelerating); and there are no conflicting DTCs present.

  1. The PCM will set a first-trip fault if it detects that the test value has exceeded the limit.
  2. The test will not run if the technician does not adhere to these suggestions.
  3. Technician in Shop 2 conducted a similar method, but chose to test the oxygen sensor’s functionality.
  4. Nevertheless, because the car had 150,000 miles on it, the dealership advised new O2 sensors instead of a costly catalyst repair.
  5. After the oxygen sensors were changed, the data from Mode $06 is shown in Fig.5.
  6. Were it not for a customer’s request that the car be released, it would have returned shortly thereafter.
  7. 5 include the following: After the O2 sensors were changed, the DTCs and I M Readiness Monitors were cleared, and the vehicle was no longer in danger of stalling.

The initial Mode $06 test is sufficient to raise the P0420 to the pending state.

Following that, he investigates the problem and follows the service routine, which advises that the catalyst be replaced.

After the catalyst was changed, the Mode $06 data is shown in Fig.

The value of the Mode $06 test is significantly lower than the maximum value allowed for the test.

No DTCs are still outstanding.

When it comes to nearly everything detected by Mode $06, the technique followed by the technician in Shop 3 can be employed.

In addition, the data for a large number of automobiles is restricted, which is the sole drawback.

You might be surprised to learn of a repair approach that makes use of Mode $06.

In my opinion, the key is not to clear the DTCs using the scan tool, because doing so instantly resets the I M Readiness Monitors, which necessitates a lengthy amount of drive cycle time.

FIGURE 7A: Screen shot taken from a 1999 Toyota Tacoma while using the Bosch KTS-570 diagnostic scan tool in the OBD II general mode, as shown in the previous section.

This feature is not available on the majority of OBD II generic scan tools, though.

As I was previously aware, the most recent catalyst Mode $06 test result had surpassed the test limitations, indicating that the problem was still present.

The DTC was no longer active in the system.

7a, after 83 seconds of driving, TID $01-CID $01 increased from 0 to roughly 150, exceeding the 128 limit.

Road testing was performed after the catalyst was changed, as seen in Fig.

My road test results improved marginally when I performed it with a new catalyst (the value increased to roughly 12), indicating that replacing the catalyst resolved the DTC P0420 test restrictions.

After 40 warm-up cycles, the DTCs will be erased.

In this Toyota P0420 example, the trips took roughly 80 seconds, and I was able to switch off the MIL after three journeys using this method.

It is not guaranteed to work in all DTC scenarios, but it has saved me a lot of time in my experience.

Some automobile manufacturers have good data, while others are attempting to enhance the quality of their data.

Due to the fact that it will not operate in all conditions, you will need to practice with different cars in order to become familiar with it.

Each scan tool has a different set of options, so you’ll need to choose one that gives the information and format that you want the most. Make use of Mode $06, which is one of several diagnostic tools that can assist you in solving problems more quickly. Obtain a PDF version of this document

Using Mode $06 to Diagnose Misfires

For every misfire that occurs in a cylinder, the OBD II system adds one number to a running total of misfires for that particular cylinder. Often, when the rate of misfire in any cylinder reaches a specified threshold (typically about two percent), the engine will set a misfire code for that cylinder and turn on or flash the Check Engine light for that particular cylinder. If the incidence of misfires is smaller than roughly two percent, however, it will almost always fail to set a code. Still, the misfire may be evident enough that you may feel it when the engine is under strain or when the vehicle is moving quickly.

Note: If your scan tool does not automatically convert the cylinder misfire data, you may need to seek up the Mode $06 test reference code for the cylinder misfire data.

It is possible to identify each cylinder by its Component number ($01), which corresponds to the number of cylinders that fire in the engine’s firing sequence ($02), $03, and so on.

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A few infrequent misfires (say, less than 100 over a particular length of time) are normally considered acceptable in most situations.

How Mode $06 Data is Displayed

On earlier professional-grade scan equipment, all of the mode $06 data is stored in hex code with no indication of the units of measure. On modern professional-grade scan instruments, the software will frequently convert the Mode $06 data into language and units of measure that are more easily understood. The information is organized into three columns: * The abbreviation ‘TID’ stands for Test identification. This is the sensor or component that is being monitored on the line in question. Component identification is denoted by the abbreviation ‘CID.’ This is the outcome of the test performed on that sensor or component.

Translating Mode $06 Hex Code

To make sense of the data when a scan tool does not translate the mode $06 hex code, tables that list the TID and CID definitions must be utilized in conjunction with each other. Not all automobile manufacturers make their mode $06 information publicly available.

The information about Ford and General Motors’ mode $06 may be obtained on the car manufacturer’s service information webpages, as well as on the International Automotive Technicians Network website (www.iatan.org) (). To view the GM Mode 06 charts, please visit this page.

Additional Mode 06 Diagnostic Information:

Mode 06 characteristics for the General Motors 4.6L engine (PDF file) Honda Mode 06 information for the 2005 model year (PDF file) Mode 06 helps you get the most out of your scan tool (Vehicle Service Pros)

More OBD II Diagnostic Articles:

On-Board Diagnostics for the Check Engine Light Code of Disappointment Types of Codes and Diagnostic Assistance TROUBLE CODES are codes that cause problems. More information about Check Engine Lights Diagnostics of Fault Codes P0171P0174 Ford P0171P0174 Codes of Conduct for Lean Diagnostics of the Scan Tool Help using the Scan Tool Scan Tool Companion is a piece of software. Onboard decoding is available. Diagnostics Understanding the Driveability of the OBD II System Problems with Emissions Engine Diagnostics Using the OBD II Protocol Controller Area Network (CAN) is an acronym that stands for Controller Area Network (CAN) Diagnostics Diagnostic Procedures for the OBD II Please assist me with DTC P0300 Random Misfire Codes.

Technical Articles on the Carley Automotive Website INFORMATION FOR QUICK REFERENCE HELP GUIDES

Get OBD II Quick Reference Guide (click here)

Make sure to check out our other websites as well: CarleySoftwareOBD2HELP.com Random-Misfire.com TROUBLE-CODES.com Scan Tool AssistanceTROUBLE-CODES.com

What is Mode $06 and the other OBD II Modes?

OBD II modes are divided into nine categories, each of which has been allocated a unique mode number prefixed by a $ sign to denote the hexadecimal code that it represents in the hexadecimal code table. There are eight different categories of OBD II modes. Each category has a unique mode number, which is followed by a $ symbol to signify the hexadecimal code that the mode represents. Full-featured, professional-level scan tools have access to all eight working modes, but cheap code readers and entry-level DIY scan tools only have access to a handful of the options.

This mode identifies the powertrain information that is available to the scan tool, lists the status of OBD II self-check monitors (some of which are continuous or on-going while others are non-continuous and only run when specific operating conditions are met), calculated values (airflow, engine load, fuel trim and so on), as well as all of the available sensor values (which are referred to as PIDs or parameter identifications).

  1. Some code readers and entry-level scan programs may be able to read some Mode $01 data, depending on their configuration.
  2. This mode displays data from a freeze-frame sequence (data captured and recorded when a fault occurs).
  3. Some can save freeze-frame data for many codes at the same time, whilst others can only store data for the most recent code at one time.
  4. Full-featured scan tools may also access additional codes (body, ABS, HVAC, airbag, and so on) that are available on the car.
  5. Mode $04— This mode is used to remove previously stored fault codes as well as to reset the OBD II readiness monitoring systems.
  6. Mode $05— This mode, which is only available on full-feature scan tools, displays the oxygen sensor monitor screen as well as the oxygen sensor test results, which include the lowest and maximum voltages for the oxygen sensor.
  7. Mode $06— An sophisticated diagnostic mode that is accessible on most full-featured scan tools that allows for the reading of real test data for noncontinuous monitors to be performed on the scanner.
  8. In Mode $06, the value of the test is shown in hex code, which must be translated using special software or by using vehicle-specific reference charts.
  9. If the vehicle has passed an OBD II plug-in emissions test and the monitor has not detected any defects, the car will pass the test.

Mode $08 is only available on full-featured scan tools (PCM). Mode $09— This mode is used to display vehicle information such as the vehicle identification number (VIN), PCM calibration, and so on.

Maximizing your scan tool with Mode $06

The following tools were used: The majority of technicians operate their scan instruments in a manner that corresponds to the manner in which they perform diagnostic checks on cars. The majority of the time, this process begins with the acquisition of fault codes, followed by an analysis of the datastream to discover which system or components are not functioning properly. During the repair, the technician may or may not use freeze frame data to assist clarify what was going on with the vehicle whenthe problem occurred.

  • Even while this method works well most of the time, it does not allow you to get the most out of your scan tool if this is your sole method of using it.
  • The previouslydescribed technique of testing only utilised four of the nine possible modes on most scan equipment, which may be confusing to those who are unfamiliar with their scanner.
  • Obtain freeze frame data in mode 2.
  • Mode $06 – The findings of on-board monitoring Mode 7 – Obtain emission-related DTCs during the current or most recently completed driving cycleMode 8 – Control particular systems in a bidirectional manner The ninth mode is to inquire about a vehicle’s identify.
  • Many technicians are either unaware of what Mode $06 is or do not see the need of employing it in their daily work.
  • In addition to monitoring misfire data, the vast majority of them claim that they do not utilize it at all, especially on Ford goods.
  • The most effective applications of this mode are to evaluate if a monitored system is operating within its boundaries, to detect whether the system is on the verge of failing, and, in many circumstances, to establish why the monitor is not, or has not, finished.

Basically, if the ‘check engine’ light is illuminated, it means that the vehicle has failed at least one of a series of electrical and functional tests that the PCM uses to determine whether or not the monitored system is operating in a manner that allows the vehicle to remain in compliance with emission regulations.

It is possible to examine the results of the monitored system’s test, as well as the results of all other monitored systems’ tests, whether they succeeded or failed, in Mode$06 of your scan tool.

Making sense of Mode$06 – Using your scan tool

It is necessary to recognize that Mode $06 is a function of the general, or global, OBD-II system in order to comprehend it. This means that you may need to depart from the OE vehicle-specific enhanced function and enter into an universal OBD-II function, depending on the scan tool you are using. Several of the latest scan tools will automatically travel from one region to another without the need to depart, which may save you a significant amount of time and effort. The fact that there are certain systems that are being watched is something else you will need to be aware of.

  1. Each CID is made up of a set of tests that are used to assess whether or not all of the components required to run and monitor the operations of a system are correctly functioning and functioning.
  2. On a 2011 Ford, for example, a CID of $80 and a TID of $21 will indicate that the test is for a catalytic converter monitor and that the component test is assessing the switch ratio of the rear oxygen sensor on bank 1 of the vehicle (seeFig.
  3. It is mentioned later in this post how to identify certain CIDs and TIDs.
  4. It also displays whether or not the test has been finished and, if so, whether or not it was successful.
  5. (seeFig.

Making sense of Mode$06 – Obtaining information

Upon viewing the Mode $06 data, you will notice that it is listed in hexadecimal (hex) format, which is what you want. The ‘$’ symbol is used in the automobile industry to signify that the numbers after it are hexadecimal. The dollar sign is employed because it refers to value, which means that the numbers that follow the ‘$’ sign represent a specific value rather than a generic number. In Mode $06, the system (CID) is identified, as well as the particular test(s) performed (TID), as well as the results and limitations of those tests (all in hexadecimal format).

  • A converted format gives you the opportunity to view very exactly what components and systems are being evaluated as well as how they are being tested.
  • You also have the power to counsel or warn your customer about any future concerns that may arise.
  • All of the usual subscription services, such Mitchell 1, ALLDATA, and Identifix, have some information available, however the information may not be particularly useful depending on the car in question (seeFig.
  • In addition to these websites, nastf.org and OEM1stop.com provide more information about Mode $06.

The advantage of these two sites is that they both contain connections to OEmanufacturers on their own websites, and because the information is all in one place, it is easy to access information.

Using Mode $06 – Whatto do with it

What does it imply to you if you are in Mode $06 with your scan tool and you are monitoring a certain monitor and test, what do you think it means? In this case, the true usefulness of employing this portion of your scan tool becomes apparent, and it is also the point at which you may need to alter your diagnostic method and mentality. Consider the following scenario: you are troubleshooting a car that has the ‘checkengine’ light illuminated. Your standard testing procedure, which did not include the use of Mode $06, discovered a P0300 DTC, which indicates random, or many, misfires (seeFig.

  • It is evident from the freeze framedata that the misfires are occurring while the system is idling, and it also suggests that the system is running too rich.
  • After replacing the fuel pressure regulator and the spark plugs, which had been contaminated with petrol, the car runs and drives normally, and the ‘check engine’ light has been extinguished.
  • If you want to be certain that the car has been fixed thoroughly, you should make certain that all of the monitor checks have been completed and have been passed.
  • The full use of Mode $06, on the other hand, can go a step further in ensuring that the car has been thoroughly fixed.
  • If this occurs, your client will, of course, conclude that the light is lighted for the same reason it was originally illuminated and that you did not properly repair their car.
  • The fact that unburned gasoline in the exhaust will cause harm to the catalytic converter is well known to all of us.

5), you could have informed your customer that there was a possibility that the catalyticconverter had been damaged as a result of the leaking fuel pressure regulator Even if the client declines the further work, you have informed them that there is a potential problem, and if the ‘check engine’ light comes on again, the customer will not believe that you did not properly repair their car.

As an illustration, consider the usage of an ambient or intake air temperature sensor (IAT).

It is possible to detect a leak in the system through the usage of the ambient IAT sensor, which the EVAP monitor makes use of.

If the pressure in the system does not increase sufficiently, the monitor concludes that there is a leak in the system.

To ensure that all of the sensors are functioning properly, use your scan tool to monitor the PIDs and compare them to what you should expect to see under the given conditions.

So, to summarize: You won’t become an expert using Mode $06overnight, and you’ll most likely not see the full advantage of utilizing it until you put in the necessary effort. However, using it can protect you from experiencing rebound troubles that might have been avoided.

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