P0123 Dodge?


  • P0123 is a relatively common OBD-II code. It’s generic, which means it has the same meaning for the Dodge Sprinter as it would any other vehicle. It’s an OBDII code that references issues with the Throttle Position Sensor

How do I fix code P0123?

What repairs can fix the P0123 code?

  1. Repairing or replacing the TPS connector for shorting.
  2. Repairing the wiring short as necessary.
  3. Replacing the TPS with a new sensor.

What causes a P0123 code?

The most common causes of P0123 are faulty throttle position sensor, open, shorted or poor electrical connection at the throttle position sensor. Other possible causes include: TPS not securely mounted. Faulty TPS.

What will a bad throttle position sensor do?

What happens when my throttle position sensor goes bad. When a TPS goes bad, then the car’s throttle body won’t function properly. It could either stay shut or it won’t close properly which is a severe issue. If it stays shut then your engine is not going receive air and it won’t start.

Can a throttle position sensor be reset?

The easiest way to reset your throttle position sensor is to unhook the negative cable from your battery for up to five minutes or to remove the fuse for your engine control module. Resetting is sometimes all that is required to restore your sensor.

Can you drive without a TPS sensor?

The TPS or Throttle Postition Sensor tells the ECU how far the throttle is open, thus how much fuel is demanded. You will still be able to drive without a TPS, though not very well. The ECU will see a lean condition from the o2 once to open the throttle and it will atempt to richen it up.

What are the signs of bad throttle body?

What are the Signs of a Bad Throttle Body?

  • Stalling.
  • Unstable idle.
  • Rough running.
  • Illuminated check engine light.
  • Reduced power warning message on the dash.

What are the symptoms of a bad throttle pedal position sensor?

Bad Accelerator Pedal Position Sensor Symptoms

  • Your car hesitates to move when the gas pedal is pressed.
  • Rough Idle.
  • Your car doesn’t accelerate over a specific limit.
  • Your car won’t shift up or jerks upon depressing the pedal.
  • You experience low gas mileage.
  • Check Engine Light.

Where is the throttle position sensor?

The throttle position sensor is mounted onto the throttle body and measures the opening and closing movements of the throttle valve and these are transmitted to an engine control module, this information, as well as other measurements including; temperature, engine RPM and mass air flow (MAF), are used by the engine

Can I drive with a bad throttle position sensor?

Can you drive with a bad throttle position sensor? It is not a good idea to drive with a bad throttle position sensor. Driving your car in this condition can be dangerous because your car might not accelerate properly or could suddenly accelerate without the driver pressing the gas pedal.

Does throttle position sensor affect transmission?

The Throttle Position sensor measures the throttle position, which is controlled by the gas pedal. It is used to determine engine load and if it fails it can cause automatic transmission shifting problems.

How do you reset the electronic throttle control system on a Dodge Ram?

To reset the Dodge Ram throttle position sensor(TPS), You need to turn on the ignition without Your foot on the brake, so the engine doesn’t start. Then press the accelerator on the floor for 15 seconds. Release the accelerator. Then turn the car off and start the engine and drive.

Does a throttle position sensor need to be calibrated?

Once you have fitted a Throttle Position Sensor, or TPS, you will need to calibrate it from within MEITE. The signal on the chosen pin should sweep from approximately zero to five volts as you move the throttle from fully closed to fully open.

Dodge Ram P0123: TPS ‘A’ Circuit → High Input

P0123is a rather typical OBD-II trouble code to encounter. It’s a general term, which means it has the same meaning for the Dodge Ram as it would for any other type of automobile. A troubleshooting code for the OBDII system that refers to a problem with the Throttle Position Sensor (TPS). It is a pretty serious issue because it has the potential to leave your car stranded or severely restricted. The Throttle Position Sensor keeps track of the angle at which the throttle blade is turned. Approximately.45 volts is the signal that is transmitted back to the ECM when the throttle is depressed all the way.

P0123 happens when the voltage from your RAM’s TPS is higher than the upper working range of the RAM’s internal voltage regulator.

Dodge Ram:P0123 Symptoms

The symptoms of P0123 will vary depending on the year and type of your Ram, but they will almost likely create visible changes in the way that your vehicle operates. You might expect your RAM to compensate in a variety of ways if the TPS does not provide an enough signal. The following are the most often observed symptoms of P0123:

  • Throttle Response– Your mayRam does not respond at all when you press the throttle. This reduced power serves as a safeguard, allowing the vehicle to continue to drive, although at a slower speed. Because the ECM will not be able to determine how much throttle response is truly occurring when you press the gas pedal, The Ram’s computer may have a tough time setting the idle speed just correct if it doesn’t know where the throttle is located precisely.

A variety of symptoms will be seen depending on the model year and engine mix used.

P0123 Diagnosis:Dodge Ram

P0123 on the OBDII code reader indicates a critical condition that demands immediate attention. It might be difficult to diagnose without a decent scanner and a thorough understanding of what you are doing. An example of how to diagnose this code with a scanner may be seen on YouTube in this video. A competent technician will make use of a scanner to determine when the codes were set and to reset them if necessary. They’ll then wait to see whether the problem reappears. If everything checks out and the code is returned, they may proceed to replace the TPS sensor that was malfunctioning.

It is no longer keeping track of how hard the gas pedal is being pressed anymore.

P0123 Causes- Ram

P0123 is caused by a number of different problems. They are as follows:

  • Cabling Issues– Because the TPS is so easily accessible, it is a good idea to do a visual examination of the wiring and harness that connects it to the engine’s computer before proceeding. Is there any structural damage? Here’s an excellent article on how to diagnose a short circuit
  • TPS is a problem– There is a YouTube video showing how to diagnose a TPS sensor, which may be seen above. If you require one, they are available on Amazon for a reasonable price. TPS is not properly installed– It is conceivable that the TPS sensor was not correctly installed, however this is not very typical. Whether you have recently changed the sensor and are experiencing P0123, it is a good idea to review the replacement sensor instructions to see if this is mentioned at all
  • Otherwise, proceed as directed.

Dodge Ram P0123 Conclusion

It is possible to save the price of purchasing a TPS sensor that your Ram does not truly require by diagnosing the problem using a scanner or by having a professional examine the vehicle. Good luck with your Dodge Ram’s P0123 troubleshooting. If you have anything to contribute, please leave a remark in the section below. Thanks for reading. Thank you for taking the time to read this.

P0123 Throttle Position Sensor/Switch A Circuit High Input : OBD-II Trouble Code

A Circuit with a Throttle Position Sensor/Switch A High Input

What does that mean?

This diagnostic trouble code (DTC) is a general powertrain code, which means that it applies to any cars that are equipped with the OBD-II diagnostic system. Despite the fact that they are general, the particular repair processes may differ based on the make and model. The TPS (Throttle Position Sensor) is a potentiometer that is fitted to the throttle body. It measures the position of the throttle. It determines the angle of the throttle blade. The TPS (Throttle Position Sensor) delivers a signal to the PCM (Powertrain Control Module), which is the main computer that controls the vehicle’s operation when the throttle blade moves.

This signal line is used by the TPS to provide information about the throttle position back to the PCM.

As soon as the throttle is closed, the signal voltage is close to.45 volts. During WOT (Wide Open Throttle) operation, the TPS signal voltage will approach the maximum of 5 volts. This pin will be set when the PCM detects a voltage greater than the typical upper limit of the voltage range.


Symptoms may include any of the following:

  • Symptoms such as a rough idle, a high idle, and surging may be present, as well as additional symptoms.


One or more of the following events may have occurred when the code P0123 was generated:

  • The TPS is not properly attached
  • When the TPS circuit is shorted to the ground or another wire, TPS failure
  • A damaged computer (PCM)
  • And so forth.

Possible Solutions

The first step is always to look for technical service bulletins (TSB) for your specific vehicle, which may be found online. It is possible that your problem is a known issue with a known fix that has been released by the manufacturer, which can save you both time and money throughout the diagnostic process. There are no symptoms in this case, thus the most straightforward solution is to reset the code and see whether the problem persists. As soon as you notice any symptoms, such as stumbling or hesitation in the engine, thoroughly examine all wiring and connectors that go to the TPS.

Make sure the voltage at the TPS is correct (refer to a service manual for your vehicle for this specific information).

To ensure that there are no breakage or rubbing against other components, carefully trace each wire from the TPS wiring harness.

Related DTC Discussions

  • Error codes on a 1997 Camaro V6 P0123 P0118 P1406 P0123 P0118 P1406 My vehicle is a 1997 Chevrolet Camaro with a 3800 series 2 automatic gearbox. My car had been sitting for a year before I was able to start it and change all of the fluids. I also had my SES indicator illuminated. I looked at the codes and found them in the following order: P0123, P0118, P1406, P0123, P1406. My TPS sensor, ECT sensor, and MAP sensor were all replaced. Codes are still being read by the scanner. I cha
  • The dreaded p0123 – TPS has been upgraded. sputtering incessantly! We’re talking about a 1999 Jeep Wrangler Sport, to be precise. Prior to that, however, the CE light and the AIRBAG light both came on, and I began to splutter. It was determined that the manifold needed to be replaced. Everything, even the horn, is functional. A few posts I’ve been following have suggested that a malfunctioning clock spring might be the cause of the P0123/P0351 and P0138 codes. Recently, I’ve been experiencing some difficulties with my truck. The issues I’ve encountered are a harsh idle that eventually causes the car to die, as well as hesitancy when starting off from a stop. Additionally, the torque converter will not lock up. The vehicle has more than 150,000 kilometers on it. 2002 Jeep Grand Cherokee P1598 P0753 P0123 P0051 P0031 I’ve performed the routine maintenance on the transmission every 50,0 miles, according to the owner’s manual. A month ago, the vehicle experienced engine stalling and displayed the P0301 (cylinder1 misfire) code. When I changed the spark plugs and cleaned the throttle body, the problem went away for about a day. I also tested and cleaned the IAC sensor, checked for vacuum leaks, and tested and cleaned the fuel injectors, and the problem returned. Then there’s the engine code for a 1999 Dodge Ram 1500 5.9L Z engine. p0123 4×4 p0123 Okay, so I’ve double-checked everything and looked around. In my knowledge, TPS p0123 indicates a voltage that is excessively high, and that it typically indicates that I have a short someplace. In order to probe pin 17 of the supply wire, I detached the connector at the PCM. There are no breaks at either end, and there is continuity, so I suppose there aren’t any. I accomplished the same thing for the following Mazda Miata models: 2000 P0102 P0123 P1771 Greetings, fellas. I’m completely out of my depth and in desperate need of assistance. I have a Maxda Miata with an issue, and I need your help. The engine is running and the rpms are consistent, but there is no power being transmitted to the wheels, and the automobile begins to slow down. After that, it catches and then doesn’t catch in a stuttering motion. After 2-3 hours of dr, the problem manifests itself
  • Explorer P1400 was redirected to P0113, P0118, P0123, P0453, and P0708. Hello, everyone. I’m new to this site and am hoping to get some assistance. My vehicle is a Ford Explorer 2002 with a 4.0L engine. I received a P1400 error number, so I removed the DPFE sensor to replace it. However, when it was detached, the truck was started.:oops: It was only running for approximately 10 seconds when I decided to stop it. Then I reconnected the sensor
  • 98 Jeep Cherokee codes p0123 and p1597 were shown on the screen. My Jeep Cherokee Sport was purchased in 1998. I’ve tried changing the throttle speed control, but the error code p0123 persists. We examined the item and found it to be in good working order. When you turn off the ignition, the check engine light does not come on. The Jeep is in superb working order. as well as concepts My tags expire at the end of November, and my apartment complex will tow it away. 1999 Jeep Wrangler p0123 TPS voltage code failed when it failed in March. I’m working on a 1999 Jeep Wrangler with a 4.0-liter six-cylinder engine. I measured the resistance of the tps across the whole working range, as well as the voltage over the same range, and everything seemed to be within specification. When the throttle is not engaged, the TPS shows 15.7 percent duty. p0123 code might be caused by a short in the wiring harness or connector, I believe. P0123 Code is a four-letter code that represents the number zero. Earlier this week, my wife scrubbed the Durango engine (ah nooo), and she was greeted by the dreaded P0123 excessive voltage at TPS code on the check engine light. No matter what you do, the code will not be cleared. When this occurred, the TPS had barely been in operation for a month. There is no evident damage to the TPS cables that I can see. When it comes to the TPS, I’m not sure how to verify the voltage.
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Need more help with a p0123 code?

If you still need assistance with the P0123 error code, please ask your issue in one of our FREE vehicle repair discussion boards. Please keep in mind that this material is being provided solely for informational reasons. It is not meant to be used as repair advice, and we are not liable for any actions you take in relation to any vehicle. All of the information on this website is protected by intellectual property rights.

P0123 – Meaning, Symptoms, Causes (& Hot To Fix It)

It is indicated by the P0123 code that there is an issue with the throttle/pedal position sensor. When the engine control module (ECM) detects that the output voltage rating of the throttle position sensor exceeds the manufacturer’s standard, the P0123 error code is generated. It is worth noting that the throttle position sensor is simply another term for a potentiometer, and that it is positioned on the throttle body, whereas the pedal position sensor is connected to the accelerator pedal system.

When the voltage value of the TPS switch does not fall within the required range, the P0123 code is triggered.

P0123 Symptoms

Listed below are a few of the most often encountered symptoms connected with the P0123 error code: Starting Out Can Be Difficult Engine performance is sluggish. While accelerating, there is some hesitation from the engine. Engine idling causes the check engine light to glow.

Possible P0123 Causes

Here are a few of the reasons why the P0123 error code appears on the screen.

Position of the throttle position sensor is incorrect. The throttle position sensor has been damaged. Throttle position sensor that is not working properly The pedal position sensor is not working properly. Throttle body that has been contaminated Wiring that is faulty or broken

Possible P0123 Solutions

The throttle position sensor should be replaced. The throttle position sensor should be cleaned or serviced. Replace the pedal position sensor with a new one. The throttle body should be serviced. Restore the integrity of faulty wire connections.

How to Diagnose the P0123 Code?

Before diagnosing the P0123 error code, check sure that the automobile battery charger is connected. Your car’s engine will be running while the P0123 fault code is being investigated, which might cause the battery’s charge to decrease fast. It is advised that you connect a car battery charger before analyzing the problem in order to prevent this situation. This one is available on Amazon if you don’t already have one in your possession. NOCO Genius G3500 6V/12V 3.5A UltraSafe Smart Battery Charger (NOCO Genius G3500 6V/12V 3.5A UltraSafe Smart Battery Charger)

Use the OBD2 Scanner

AnOBD2 scanneris a fantastic tool for scanning and monitoring issue codes, and it is highly recommended. Every automobile manufactured after 1996 is equipped with an onboard diagnostic system, which is a standardized system that is used for self-diagnosis and reporting. Reading and clearing codes, as well as providing real-time data and recording information, are all capabilities of the OBD2 scanner. Alternatives to the OBD2 scanner include using a digital multimeter, which is less expensive but does not have the features that the OBD2 scanner provides.

Check for TPS wiring harness

Before replacing the sensor or doing any other treatment, it is a good idea to inspect the wire harness that connects the throttle position sensor to the rest of the vehicle (TPS). Inspect the wiring for evidence of damage or corrosion and make a note of any findings.

Inspect Throttle body assembly

Take a visual inspection of the throttle body to see whether it is unclean or contaminated. If it is, in fact, unclean, a throttle body cleaner may be used to clean it. These can be purchased at any auto store, as well as on eBay and Amazon. After you’ve cleaned the throttle, try resetting the code to see if the problem returns.

Test the Ground

Ground voltage should be checked using a multimeter. To test the battery’s positive terminal, connect the red multimeter lead to the positive terminal of the battery and the black multimeter lead to ground. Observe whether or not the reading is near to the battery voltage. If it is, the ground is in good condition. If this is not the case, it is possible that there is an issue with the power supply.

Testing the Sensor

If you don’t see anything amiss with the throttle position sensor after doing a visual inspection, it’s time to check the voltage across the sensor. Set the digital multimeter to the volt setting and examine the car wiring schematic to determine which wires are connected to which components. Insert the black pin of the connection into the signal wire pin and the other pin into the ground pin of the connector.

Slowly open the throttle valve and take note of the reading on the gauge. Ideally, the voltage should rise as the throttle valve is opened, with an optimum reading of 4.5 volts when the throttle is completely open. The value should be 0.45 volts while the vehicle is in the idle position.

Cleaning the Throttle Position Sensor and connector

To avoid having to replace the throttle/pedal position sensor, it is a good idea to have the sensor cleaned and serviced first, since a filthy sensor will provide inaccurate data to the vehicle’s computer. You should have the following tools on hand in order to do the servicing: a solution for cleaning a freshly laundered cloth ScrewdriverGloves

Step 1: Let the engine run for a while

Start the car and allow it to idle for a few minutes before driving away. This will cause some of the dirt to dislodge itself from the engine’s internal components, which will heat them up.

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Step 2: Open the hood and locate the Sensor

Once the engine has reached operating temperature, open the hood and look for the throttle position sensor. It’s possible that you’ll have to remove the engine cover in order to locate the sensor.

Step 3: Disconnect the connection

To avoid receiving an electric shock, disconnect all of the cabling and connections that lead to the TPS unit. After that, gently pry the TPS off of its mounting bracket by removing the nuts and bolts that hold it in place.

Step 4: Clean the sensor and connector

Cleaning the sensor with a washing solution is OK, but avoid cleaning the actual sensor with anything that is liquid. Clean the area around the sensor thoroughly until all dirt has been removed.

Step 5: Drying the Sensor

Once the sensor has been cleaned, carefully massage it with a dry towel to remove any remaining liquid residue. After that, reconnect the sensor to its original location, shut the hood, and you’re good to go.

Should I Repair the P0123 Trouble Code Right Away?

The P0123 error code causes drivability problems as well as performance and acceleration concerns with the engine. If the problem is neglected for an extended period of time, the ECM enters the failsafe mode, and the vehicle may eventually come to a complete stop. As a result, we strongly advise that you get the P0123 error code rectified as soon as possible.

Recommended Tools to Fix P0123 Code

Scanner for the OBD2 (Digital Multimeter)Cleaning solution Charger for automobile batteries

Further Questions?

You can leave a comment below if you have any further questions about the P0123 error code or the throttle position sensor, and we will do our best to answer them. Please include the type and make of your car, as well as the symptoms you are experiencing, so that we can offer you with a solution that is appropriate for your situation.

P0123 Dodge

An example of a P0123 Dodge is a Throttle Position Sensor 1 (TPS)Circuit High condition. Specifically, the PCM is sensing voltage of 4.5 volts or above for a minimum of 1.3 seconds in this scenario. Dodge’s TPS is a standard variable resistor with a 5-volt reference voltage input and a ground wire that terminates at the PCM, as is common. Depending on the throttle position, the wiper sends out a return signal with variable voltage that is received by the computer.

Possible causes of P0123 Dodge

A high voltage can be created by any of the following: The circuit for the TPS sensor was shorted to the battery voltage. The signal circuit for the TPS sensor is open. The circuit for the TPS sensor signal is shorted to the 5-volt reference supply voltage. The TPS ground is now open.

Test for Reference voltage at TPS

Consult your vehicle’s repair manual to determine the specific wire colors that should be used. The vehicle I’ll be using in this instance is a Dodge Durango from the mid-2000’s. Back probe the pink/yellow wire entering into the TPS using a digital multimeter to ensure it is not damaged. It should be possible to see around 5-volts on the pink/yellow wire while the key is in the RUN position. Next, make sure that the dark blue/dark green wire has a proper ground connection. If you notice more than 5-volts on the pink/yellow wire, you’ve got a short to battery voltage in one of the splices/junction blocks before the TPS, which will cause the TPS to malfunction.

The wiring schematic for a Dodge Durango from the mid-2000s indicates that splice S102 is used for the 5-volt reference signal and splice S104 is used for the ground.

Here’s an illustration: On the 3.7L engine, S102 is placed near the oxygen sensor breakout for the right front of the engine.

Specifically, S102 is placed on the upper front of the right cylinder head, near the intake manifold. S104 Under the hood on the driver’s side, next to the breakout for the speed input sensor.

What shops are seeing as the cause for P0123 Dodge

1) Using a TPS sensor that is not genuine OEM. 2) The TPS sensor from an aftermarket source is not watertight. The opening allows water to pass through during rain or snow that comes in from the cowl area. 3) Infiltration of water into the splice S104 (2017, p. Rick Muscoplat is a professional musician. Rick Muscoplat posted a blog entry on

P0123: Throttle Position Sensor/Switch A Circuit High Input

Code of Error It is specified as Throttle Position Sensor (TPS)/Switch A Circuit High Input in the P0123 specification. In other words, the PCM (powertrain control module, also known as the ECM or engine control module) has decided the TPS Circuit to be used. The output voltage range of the sensor has been increased above the voltage specification of the sensor. It is a general issue code, which means that it applies to any vehicle manufactured from 1996 to the present. There are obviously differences in the definition parameters and troubleshooting information provided by various manufacturers and models.


The TPS’s primary function is to react to the movement of the accelerator pedal on the floor. It’s essentially a potentiometer that converts the position of the throttle into an output voltage, with the voltage signal being sent to the PCM through an output signal bus. The Throttle Position Sensor/Switch is located in the throttle body of the Intake Manifold, whereas the Pedal Position Sensor/Switch is located in the Accelerator Pedal assembly. These sensors offer the much-needed information from the driver’s foot in terms of how much power the engine requires and how quickly it is required to produce that power.

When the voltage signal increases and decreases, the PCM may utilize this information to regulate various parts of the Emission System Components, such as the Air Fuel Ratio, the engine’s Spark Timing, and so on.

When the PCM detects that the TPS Switch A circuit has a high output, or a voltage range that is higher than the specified voltage range, the error code P0123 is generated.

Common Symptoms

In the event of an error code P0123, the check engine light illuminates and the PCM enters failsafe mode, cutting electricity to the throttle actuator and causing the throttle valve to shut to less than 6 o opening plate, respectively. Aside from that, depending on the type and model of the car, it may exhibit various drivability concerns, such as the following:

  • In the event of an error code P0123, the check engine light illuminates and the PCM enters failsafe mode, cutting electricity to the throttle actuator and causing the throttle valve to shut to less than 6 opening plate, as seen below. In addition, depending on the type and model of the car, it may exhibit various drivability concerns, such as those described below:

Possible Causes

A malfunctioning throttle position sensor, an open or shorted circuit, or a bad electrical connection at the throttle position sensor are the most prevalent causes of P0123 in the vehicle. Among the other probable causes are:

  • The TPS is not properly secured
  • TPS is faulty
  • Throttle Body (or carbon-filled) that is dirty
  • TPS, connectors, and wirings that are chaffed or rusted

How to Check

Prior to doing a test drive, it is critical to capture the freeze frame rate data and reproduce the conditions that existed when the error code was set, just as it does with other error codes. A trained mechanic will utilize his data streaming scan tool and pay great attention to the engine load, engine RPM, throttle position, and road speed while working on the vehicle in question. After a few minutes of driving, the readings will be compared to the Intake Air Temperature sensorparameter ID.

When he has completed this, he will compare the IAT measurements to the measurements taken by the Coolant Temperature sensor, which should both be moving in tandem with one another.

The IAT sensor connection must be examined while the key is turned on and the engine is turned off.

A 5V reference voltage as well as a good ground should be present. Seek for the correct engine performance wiring diagram for your car so that you can establish the right color and placement of these connections and wires.

How to Fix

Error Code P0123 is a relatively simple error to resolve; some of the most common remedies are rather obvious, such as:

  • Repair any shorts that may have occurred in the connections or wiring
  • TPS connection or wirings should be repaired or replaced. TPS sensor should be replaced.

Since this code puts the PCM into failsafe mode, it will cause various drive complaints such as bucking or jerking, high idle, lack of acceleration and limited speed until the problem is resolved. It may even cause the vehicle to crash if the problem is not fixed in time. Performing a thorough diagnosis in order to determine the exact cause of the problem is critical when repairing this trouble code. Perform a thorough visual inspection before replacing the TPS sensor unless you are certain that it is the source of the problem.

P0123 APPS Sensor Signal Voltage Too High

It is necessary to monitor the voltage of the Accelerator Pedal Position Sensor (APPS) when the engine is operating. If a high voltage is detected on the APPSignal circuit or if a high voltage is detected between the Engine Control Module (ECM) and the Powertrain Control Module (PCM), a DTC may be recorded (PCM).

Possible Causes

  • The 5-volt Supply atAPPSShorted to Voltage (Engine Running)
  • The APPS5-volt Supply Circuit Shorted to Voltage
  • The APPSSignal Circuit Shorted to Voltage (Engine Running)
  • The APPSSignal Circuit Shorted to Voltage
  • The APPSReturn Circuit Open
  • The APPSSignal Circuit Open FromAPPSToECM
  • The APPS5-volt Supply Circuit Open
  • The PCM(APPS) Circuit Shorted to Voltage


1. Turn the ignition key to the on position when the engine is not running. Examine the DRBIII(R) scan tool for the presence of ECM and PCMDTCs. Determine whether DTC is controlled by the ECM or the PCM. If DTC is established by the ECM, go to the next step. If the DTC is not set by the ECM, go to step 11. 2. Turn off the ignition. Disconnect the connection for the APPSsensor harness. Just above the fuel injection pump, there is a bracket that holds the APPS. Turn the ignition key to the on position when the engine is not running.

  1. 5 (Dark Blue/White wire) on the APPSharness connection using a digital multimeter.
  2. If the voltage is less than 5.5 volts, continue to step 5.
  3. Turn off the ignition.
  4. Make any required repairs.
  5. Turn the ignition key to the on position when the engine is not running.
  6. 5 (Dark Blue/White wire) and terminal No.
  7. If the voltage is less than 5.5 volts, go to the next step.
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Turn off the ignition.

Disconnect the connection for the ECM harness.

At the ECMharness connector, look for a loose connection or a bad terminal contact.

Turn the ignition key to the on position when the engine is not running.

5 (Dark Blue/White wire) on theAPPSconnector with the use of a DVOM.

If the voltage is less than 5.5 volts, the ECM should be replaced and programmed.


Make any required repairs.

Engine should be started.

3 (Light Blue/Black wire) on theAPPSconnector using an aDVOM.

If the voltage is less than 5.5 volts, continue to step 8.

Turn off the ignition.

Measure the voltage between the cylinder block (ground) and terminal No.

The process continues if the voltage measured is greater than 5.5 volts.

(short only exists when the engine is running).

Turn off the ignition.

Disconnect the connection for the ECM harness.

At the ECMharness connector, look for a loose connection or a bad terminal contact.

Turn the ignition key to the on position when the engine is not running.

3 (Light Blue/Black wire) on theAPPSconnector with the use of a DVOM.

If the voltage is less than 5.5 volts, the ECM should be replaced and programmed.


Check to check that the APPSharness connection is still not attached.

Located on the driver’s side of the engine, immediately in front of the fuel transfer pump, the ECM is connected to the rest of the vehicle through a 50-pin connector.

Make any required repairs.

4 on the APPSharness connection and terminal No.

If there is continuity, go to the next step.


Check for continuity on the Light Blue/Black wire that connects terminal No.

25 on the ECMharness connector.

If there is no continuity, open the Light Blue/Black wire between the Apps and the ECM and fix it.

Check to see that the APPSharness connector and the ECMharness connector are still not in use.

5 on the APPSharness connection and terminal No.

If there is continuity, go to the next step.

See the REMOVAL, OVERHAUL, and INSTALLATION articles for further information.

Turn off the ignition.

The PCM is positioned in the back corner of the engine compartment on the passenger’s side.

Make any required repairs.

Voltage should be measured between the cylinder block (ground) and terminal No.

The process continues if the voltage measured is greater than 5.5 volts.


Check to ensure that the PCMharness connections are still not connected.

Voltage should be measured between the cylinder block (ground) and terminal No.

The process continues if the voltage measured is greater than 5.5 volts.


Check to see that the PCMharness connections are still disconnected, and then detach the ECMharness connector.

At the ECMharness connector, look for a loose connection or a bad terminal contact.

Turn the ignition key to the on position when the engine is not running.

23 (Orange/Dark Blue wire) on the PCMharness connector C1 with the use of a DVOM.

If the voltage is less than 5.5 volts, the ECM should be replaced and programmed.


Check to ensure that the PCMharness connections are still not connected.

The engine control module (ECM) is placed on the driver’s side of the engine, immediately in front of the fuel transfer pump, and it is equipped with a 50-pin connector.

Make any required repairs.

23 on PCMharness connector C1 and terminal No.

If there is no continuity, patch the open in the Orange/Dark Blue wire between the PCM and the ECM.

If there is continuity, the test is considered successful. Remove all DTCs from both the ECM and the PCM. Alternatively, if you discover that yourAPPSis not functioning properly, you may replace it with a Timbo Apps from the Mopar1973man Store.

Code P0123

On January 6, 2008, at 12:17 a.m. Registering UserThread StarterJoined on January 6, 2006Location: Hondo, Texas Posts: 257Likes: 0Received 0 Likeson0 Posts: 257Likes: 0Received 0 Likeson0 Posts: 257 P0123 is the identification code. When I inquired about this code, you informed me that it was caused by the APPS; nevertheless, I attempted to reset and change it without success. So I had a new one installed, and everything appears to be functioning well. My boost is up, and the truck has far more power than it had previously, yet the vehicle continues to throw the error.

  • What do you think of it, everyone?
  • On January 6, 2008, at 12:34 a.m.
  • Pennsylvania 837 total posts The following number of likes have been received: 0 Likeon1 It’s possible that Posthim will require several restarts before it clears on its own?
  • On January 6, 2008, at 12:39 a.m.
  • I’ll keep an eye on things and see what happens.
  • The time is 1:17 a.m.
  • Registered UserJoined on November 2, 2002 lyman, utah is the location.

On January 6, 2008, at 8:23 p.m., Registering UserThread StarterJoined on January 6, 2006Location: Hondo, Texas Posts: 257Likes: 0Received 0 Likeson0 Posts: 257Likes: 0Received 0 Likeson0 Posts: 257 I cleansed them myself by unplugging the batteries for a period of more than 30 minutes.

It’s possible that I’ll wind up returning it some time next week.

Comments: 3811 Likes: 0 Posts: 3 811 I’m perplexed as to why the code P0123 isn’t included in the list of available codes.

On January 6, 2008, around 8:30 p.m., Thread Starter is a registered user.

On January 6, 2008, at 8:31 p.m., Registered UserJoined on October 3, 2003Location: Northeastern Pennsylvania The number of posts is 338Likes are 0Received 0 Likes on the number of posts is 0 P0123Accelerator Pedal Position Sensor Signal Voltage Is Excessively High.

06:11 p.m.

mysterystenchHELP! 12th of December, 2009, 7:12 p.m. yarddog24 Engine and Drivetrain with Valve Technology 805-17-2006 10:53 p.m. EST

Dodge Diagnostic Trouble Code (DTC) Definition, Causes and Diagnosis

Dodge P0123 (Dodge P0123) Make:Dodge Code:P0123 THROTTLE POSITION SENSOR 1 CIRCUIT HIGH DEFINITION: Description: In order to monitor the position of the throttle blades, the Electronic Throttle Control (ETC) system makes use of two Throttle Position Sensors (TPS). Located within the Throttle Body assembly, the Throttle Position Sensors 1 and 2 measure the position of the throttle. A 5-Volt reference circuit, a low reference circuit, and a signal circuit are all included in the design of each sensor.

Powertrain Control Module contains the processors that control the vehicle’s powertrain (PCM).

The processors exchange and monitor data in order to ensure that the TPS computation given is valid.

  • The 5-VOLT SUPPLY CIRCUIT has been shortened to the voltage required
  • The TPS SIGNAL 1 CIRCUIT has been shortened to the voltage required
  • The TPS SIGNAL 1 CIRCUIT has been shortened to the 5-VOLT SUPPLY CIRCUIT
  • The TPS SIGN

Service Bulletins that are related:

  • Observe Bulletins 1, 2, 3, 4, 5, 6, 7, 8, 9, and 10. Observe Bulletins 1 and 2. Observe Bulletins 3 and 4. Observe Bulletins 5 and 6. Observe Buglins 7 and 8. Observe Buglins 9. Observe Buglon 10. Observe Buglins 1 and 2.

IAC replaced, fixed surging idle and code p0123

Thank you to everyone on this site for sharing their knowledge; without their assistance, I would have had no idea how to repair this. For the past couple of weeks, my truck has been acting strangely, surging at idling. It sounded like someone was squeezing the gas pedal. While it first started, it only happened when the car was cold, but the problem has become worse, and today it started dying at idle and throwing the code p0123 (tps voltage too high), which is confusing. (I had previously replaced the tps approximately 6 weeks prior, and this had resolved some surging issues on the cruise ship.) So I went to a nearby auto parts store and purchased an IAC for approximately $45 and replaced it today.

This time around, I was successful in recycling the previous TB gasket.

What is the most difficult is standing on a short ladder and then kneeling on the front bumper while attempting not to fall over and onto the motor underneath it.

Disconnect the three sensor wiring connectors from the throttle body’s connectors.

In order to loosen the connections, I placed a flat screw driver between the end of the plug and the Tab and gently spun the blade to apply a little amount of pulling pressure to the connector while simultaneously pressing on the tab.

On the passenger side of the vehicle, there is a flat black bracket that holds three cables, two of which come from the front and one from the back.

I couldn’t get to the one on the inside quite yet.

Bolts are tiny, about 10mm or less in diameter.


I gently unfastened them in a cross pattern, one small piece at a time.

It’s important not to screw up the tb gasket or drop anything into the intake system.

Look down in the plenum and see what you can find.


Cover the plenum so that nothing falls into it and return to your workshop.

Take caution while handling the little hose on the front sensor.

Remove the o-ring from the old iac and install it on the new iac!

Clean with a damp cloth.

The iac should be able to fit into the well without making touch with the bottom.

install tps and a front-facing sensor (dont forget the little hose).

Check if the gas pedal is operable tb; my cable was faulty and the pedal would not open.

Mine whistled like crazy and idled at a high speed for around 30 seconds as it set the iac position, after which it ran normally after it was established. Remove the air cleaner and replace it. Take a test drive. I like the quality of your work.

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