Subaru P2138? (Perfect answer)

• P2138 is a generic powertrain code that can affect your Subaru Outback’s “drive by wire” throttle system. It means that your Outback’s “D” and “E” throttle position sensors do not agree with one another on how much far the throttle has been opened. They should have a similar voltage output. In this case, they do not. P2138 Meaning

How do I fix error code P2138?

What repairs can fix the P2138 code?

1. Replacing the throttle body motor or throttle body assembly.
2. Repairing or replacing wiring that is associated with the throttle body motor.
3. Replacing the throttle position sensor.
4. Repairing or replacing wiring that is associated with the throttle position sensor.

How do you reset the throttle position sensor on a Subaru?

To reset the Subaru throttle position sensor, you turn on the ignition without your foot on the brake, so the engine doesn’t start. Press the accelerator on the floor for 15 seconds. Release the accelerator, then turn the car off and start the engine and drive.

What causes code P2138?

Diagnostic trouble code (DTC) P2138 stands for “Throttle/Pedal Position Sensor/Switch D/E Voltage Correlation.” It is triggered when the vehicle’s engine control module (ECM) or powertrain control module (PCM) detects that the signals from the two throttle position sensors (or two accelerator pedal position sensors) do

What are the symptoms of a bad accelerator pedal sensor?

Signs of a bad accelerator pedal position sensor

• Rough Idling:
• Your vehicle doesn’t accelerate over a specific limit:
• The engine does not run effectively:
• Inconsistent acceleration:
• Poor automatic transmission shifting or jerks when depressing the throttle pedal:
• Check engine light:
• Locate the APP sensor:

Can I drive my car with a P2138 code?

We recommend addressing the issue causing P2138 as soon as possible. Your car may have trouble accelerating or go into reduced power mode when this code is triggered, which lets you know it’s not the best idea to drive with P2138.

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.

Why is my Subaru idling high?

Faulty Idle Air Control Valve (ICV): Some cars are equipped with an idle air control valve to maintain idle speed. Malfunctioning Throttle: A malfunctioning throttle system can cause both a high or low idle as well as an engine stall. A dirty air intake or cracked air intake tube is often the culprit.

What should a Subaru Forester idle at?

Typically, the idle speed will be set at a value in the range of 600 to 800 RPM, but the exact value will depend on the number of engine cylinders and whether the vehicle is equipped with a manual or automatic transmission.

How much does it cost to fix TPS?

What is this? The parts will cost you between $75 and $130 on average. The labor costs will be anywhere between $60 and $90, depending on the hourly rate of the mechanics. So in total, you can expect to pay between $135 and $220 for a throttle position sensor replacement.

How do you fix a throttle position sensor?

How it’s done:

1. Scan the computer system for codes.
2. Test the throttle position sensor and related wiring.
3. Remove and replace the throttle position sensor if found faulty.
4. Clean the carbon from throttle body.
5. Re-install throttle body and reset minimum idle speed to factory specs.

What happens when 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. When the throttle gets stuck in an open position than your vehicle will receive too much air and cause it to have a high or fluctuating idle.

Where is the accelerator sensor located?

The sensor is usually located on the butterfly spindle/shaft, so that it can directly monitor the position of the throttle.

Is throttle position sensor same as accelerator pedal position sensor?

The accelerator pedal sensor (APS) indicates the position of the accelerator on vehicle models with electronic throttle control. The APS is basically a throttle position sensor (TPS) with a pedal attached.

When I press the gas pedal nothing happens?

A clogged fuel filter will not allow the amount of fuel demanded to make it to the engine on time. A driver can press the gas pedal, and all of the throttle components may be demanding the correct amount of fuel, but the pump is facing resistance at the filter and cannot allow the flow to go through to the engine.

Subaru Impreza P2138: Symptoms, Meaning, Causes + Diagnosis

P2138 is a general powertrain code that might have an impact on the ‘drive by wire’ throttle system in your Subaru Impreza. It signifies that the throttle position sensors on your Impreza’s ‘D’ and ‘E’ cylinders are not in agreement on how far the throttle has been opened. They should have a voltage output that is comparable. In this particular instance, they do not.

P2138 Meaning

1. Your Impreza’s PCM receives a signal from the accelerator position sensor when you press the gas pedal
2. The throttle position sensors confirm how much the throttle has been opened by pressing the throttle position sensor. The PCM makes adjustments to the throttle position in response to this feedback. The ‘D’ and ‘E’ TPS signals must be in agreement with one another as well as with the accelerator position sensor in order to function properly. If they don’t agree, P2138 is set
3. Otherwise,

The drive by wire throttle systems in your Impreza rely on a sensor on the gas pedal to convey the pedal position to the PCM, which in turn controls the throttle body and throttle body position sensor. Using the throttle in this manner has the advantage over using a traditional gas pedal (drive by cable), because most of the engine’s torque will be located at the beginning of the throttle, whereas using drive by wire, if you press the throttle down 20%, the computer will provide you with 20% of the engine’s torque.

This reduces wear and tear on the vehicle and helps to extend the life of the engine.

• Fuel efficiency, emissions, traction control responsiveness, cruise control, and rev limiter are all important factors to consider.

Subaru Impreza: P2138 Symptoms

The following are the most often seen symptoms linked with P2138. They are as follows:

• Reduced engine power
• Strange ‘pedal sensation’ on the accelerator
• When there is no throttle input, the engine revs up. Engine stalls
• Limp mode is activated

Subaru Impreza P2138 Causes + Diagnosis

One of the four primary faults that can cause P2138 is a problem with either the accelerator pedal or throttle position sensors, or a problem with the wiring or the PCM. The PCM is probably the least likely of these problems to occur unless there is a TSB available for your engine and model year.

1. Use a Multimeter to Examine the Wiring

Check the voltage coming from your Subaru Impreza’s D and E throttle position sensors, as well as the voltage coming from the accelerator position sensor, with a multimeter to ensure it is within the manufacturer’s standards. It will be necessary to replace the sensor in question if they are out of tolerance. That’s simple to say, but it becomes much more evident when you can see it. Try viewing this video on YouTube to see what I’m talking about. It will instruct you on how to test a throttle position sensor in detail.

2. Examine the Wiring for Opens/Shorts

The error code P2138 is frequently generated by an open or short in the wiring. Examine the pigtails that connect to the throttle position sensor to ensure that they are not tangled or otherwise compromised.

3. PCM Issues

Even if it is not the best place to begin, On some cars, a PCM reflash will correct the P2138 error code. You may find out whether there are any technical service bulletins for your Impreza’s model year and engine by checking on the National Highway Traffic Safety Administration’s website. However, it is generally more expedient to just contact the service staff at your local Subaru dealership.

Bottom Line

P2138 is a difficult code to diagnose, but it is a critical one to get right the first time. Drivers shouldn’t try to navigate the streets with a computer-controlled throttle that is unsure of how much throttle they should be applying to their car. Wishing you the best of luck with your Impreza repair!

P2138 – Throttle/Pedal Position Sensor/Switch

1:11-26-2010, 02:35 AM	P2138 – Throttle/Pedal Position Sensor/Switch

Recently my 2005 LGT started throwing the CEL and going into limp mode.It can happen just happily cruising down the freeway or during a slow trip through a parking lot.There isn’t much information on this forum about this problem.Has anyone had this happen and what did you replace to fix it?The car going into limp mode on the freeway is getting a little old.The code I pulled is:P2138 – Throttle/Pedal Position Sensor/Switch �D/E� Voltage Rationality

The Following User Says Thank You to tbssubaru For This Useful Post:

Title:GRP*

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Location:East Bay, CA

Car:RIP 05 GRP Legacy GT Sedan, 6MT DCCD

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I would check the throttle position sensor.Maybe it went bad

Yes I figured that much out already.I’m wondering if anyone on the forum had a similar problem and what they did to resolve it.Our cars have 2 sensors from what I understand, one on the accelerator ($180) and one on the throttle body ($650).

Title:GRP*

Rank:Donating Member

Location:East Bay, CA

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I’d reset the code and see if it comes back.Also check behind your pedal to make sure the stopper piece is still in place and check the movement of the pedal.Unplug each sensor and check the connectors too

the code has reset and come back around a dozen times,i’ll try cleaning the pedal connector and see if that helps,the other sensor is only sold with the throttle body for $650.00, my warranty guide says that’s covered by the 7/70 california emissions warranty so it will go to the dealer for that

Title:Back to Turbo

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page 2196, EN(H4DOTC)(diag)-326, of my 2005 vacation pix have a pretty funny shot of me under the dash diagnosing an accelerator pedal position sensor

how do i see those?was it the pedal sensor?the dealer told me i have to buy the whole pedal assembly to get the sensor.

8:01-24-2011, 01:41 PM	Same problem – no solution.

Title:Senior Member

Location:Lyons, CO

Car:2010 LGT, 2005 XT

Posts:189

iTrader:(0)

has anyone got an update on this issue? My wife’s car just started doing this, about 1x per week. Very annoying and dangerous. Since it’s so intermittent, I can’t get it to a repair shop before it clears and I worry diagnostic won’t turn anything up and they will have to start throwing parts at it. It would be nice if others have found a solution.One new piece of info for me – it did it the other day while in cruise control so I can’t see it’s got anything to do with the pedal positioning sensor.Tom

I replaced the accel pedal assembly which comeswith a new sensor.Took 1 socket and 10 minutes to do and I haven’t seen the problem since.

Title:Senior Member

Location:Lyons, CO

Car:2010 LGT, 2005 XT

Posts:189

iTrader:(0)

Do you have a part number for the pedal assembly? I was looking online but couldn’t easily find the part.

Title:Senior Member

Location:Lyons, CO

Car:2010 LGT, 2005 XT

Posts:189

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In case anyone else checks this thread – I appear to have significantly reduced the occurance of this problem by seating the connect on the accelerator pedal assembly. I was looking for potential places were there could be a loose connection or frayed wire. I noticed that the plug had backed off a ways on the connector, so I pushed it back down.Was happening 2-3x per week before doing this. Hasn’t happened since doing this, and its been about 4 weeks.I’m not saying I cured it for sure, only time will tell since it is intermittent.Tom

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i had this happen over the last week or so.I took apart the connectors at both ends, the pedal and the throttle body.Sprayed with electrical cleaner, and added some dielectric just for ha ha’s.Now we wait.I’ll report back if it fixed the issue._It’s not about speed, it’s about acceleration!

Title:Senior Member

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Title:Large Member

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as of today, hasn’t reoccurred since.Enter jinx._It’s not about speed, it’s about acceleration!

Title:Subarooster

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If this happens again, I have a spare accelerator pedal assembly that I’d be willing to lend out.that means, I’ll send it to you on your dime, and if it works, just send mine or a functional one back.I’d prefer to see a reasonable iTrader feedback rating before shipping, though._Quote:Originally Posted byRooTBeeRTits mcgee

what is p2138 and how do i fix it?

I realize this is an old issue, but I’ve checked several forums and haven’t been able to find any that offer a lasting solution to this problem. The 2005 Baja Turbo 5MT that I purchased in May has been experiencing this issue, but the 2004 Baja Turbo 4EAT that I purchased in February has not had this issue. I’m not sure what the difference is. At idle, the RPMs would vary between 1500 and 1500 rpms and below, or I would see minor spikes in gear immediately before the CEL would illuminate. Occasionally, I would observe that the cruise light would flash before the CEL would illuminate, which I thought was odd.

• This is just based on my own experience.
• Up to this point, I’ve performed all of the tests outlined in the service manual more than once.
• I’ve tried everything from switching the pedals to replacing the pedal entirely with a new Subaru OEM component.
• It has begun to occur on a regular basis and may be quite harmful in some circumstances.
• It is indicated by the P2138 code that there is a discrepancy in voltage output between the two potentiometers in the pedal assembly.
• I figured it would be worth a go.
• DISCLAIMER!
• Please be advised that if you attempt this modification and have a surge or wide open throttle condition, the most straightforward solution is to put the vehicle in neutral before pulling over and shutting off the ignition.
• Pictures of the schematic for the pedal position sensor, as well as my jerry rigged wire job, are included in the link below.
• On my automobile, the signal input wires are the blue with white stripe and the white with blue stripe, which are both colored blue.
• imgur.com/a/io0Fm I hope this has been of assistance.

Bajas are my favorite pair of shoes and I’m too stubborn to give them up. My wife, on the other hand, insists that I sell one. If I encounter any additional difficulties, I will report back.

r/MechanicAdvice – Subaru legacy 2006 2.5i P2138 code

Hello! Subaru Legacy 2006 is the vehicle I own. It’s not the GT, it’s simply the regular. To put it another way, I’ve been having issues with my car going into limp mode and losing acceleration power all of a sudden. P2138 was the code I received after having the codes read. I took my car to a reputable technician, who advised me that repairing the pedal mechanism would most likely address the problem before spending a lot of money on something else. I agreed. The next day, I drove to a Subaru store and purchased a new accelerator pedal component for my car.

1. When I pressed the new pedal, the lights came on instantaneously, and the car went into limp mode.
2. I reset the computer by unplugging the battery (which was probably a bad move, I know), and the check engine light was no longer on, and the replacement pedal functioned normally.
3. What if I did the wrong thing by resetting the computer, even though it would have required that action anyway to clear the code?
4. Is it necessary to purchase a whole new throttle body if the problem is related to the throttle position sensor, or can I simply purchase the throttle position sensor and place it on the new throttle body?
5. 3.) Does anyone have any other ideas as to why the code is being displayed?
6. Is it necessary to get a new throttle body programmed into my car computer if I have to replace the old one?

Subaru P2138

Hello! My Subaru Legacy was manufactured in 2006. Nothing special about this one; simply a basic model. Anyway, I’ve been having issues with my car going into limp mode and losing acceleration power all of a sudden. It was determined that I had a P2138 code. Upon visiting a trustworthy mechanic, he determined that repairing the pedal mechanism would most likely resolve the issue before spending a lot of money on something else. The next day, I drove to a Subaru store and purchased a new accelerator pedal component for my vehicle.

• When I pressed the new pedal, the lights came on promptly, and the car went into limp mode.
• I reset the computer by unplugging the battery (which was probably a bad move, as I now see), and the check engine light was gone, and the new pedal functioned as expected.
• 2.) Is it correct that I reset the computer because it would have required to be reset otherwise in order to clear the error message?
• Is it necessary to purchase a completely new throttle body if the problem is caused by the throttle position sensor, or can I simply purchase the throttle position sensor and place it on the new throttle body?
• 3.) Does anyone have any other ideas as to why the code is appearing on the computer screen?

Fourth, is it possible to get a replacement throttle body on eBay, or do you advocate purchasing it from a Subaru dealer who is allowed to do so? Is it necessary to get a new throttle body programmed into my auto computer if I need to replace it? Do you think it’s a good idea to use it right away?

Also interesting

Subaru P2138 circuit tests

1) Make sure the connector at the throttle/pedal is firmly connected by checking the Subaru throttle/pedal wiring diagram connector at the throttle/pedal. If this is the case, proceed with the circuit testing. In the second step, back probe terminals 3 (Green/black) and 1 (White/blue), using a digital multimeter. There should be a 5-volt reference voltage visible (key in RUN position). If this is the case, the circuit back to the ECM should be checked. 3) Check for ground by backprobing terminals 4 (blue) and 6 (black/white).

• If you see a greater voltage, look for faulty ground connections to determine the cause.
• The reading should range from 1200- to 4800-decibels.
• The resistance readings between terminals 4 (blue) and 5 (red) should be checked while the connection is still disconnected in step 6.
• The range of readings should be 500 to 2500.
• You should be able to view 280 to 1680.
• Terminals 4 (blue) and 5 (black) should have values ranging from 200- to 800-.
• If the readings are not within specification, the throttle/pedal should be replaced.
• Rick Muscoplat is a professional musician.

Subaru Legacy Service Manual – Dtc p2138 throttle/pedal position sensor/switch ‘d’/’e’ voltage correlation

DTC DETECTING CONDITION:Immediately at fault recognitionTROUBLE SYMPTOM:Improper idlingPoor driving performanceCAUTION:After servicing or replacing faulty parts, perform Clear Memory ModeClear Memory ModeOPERATION, and Inspection ModeInspection ModePROCEDURE.WIRING DIAGRAM:Engine Electrical System ENGINE TYPE FB (WITHOUT PUSH BUTTON START)Engine Electrical SystemWIRING DIAGRAMEngine Electrical System ENGINE TYPE FB (WITH PUSH BUTTON START)Engine Electrical SystemWIRING DIAGRAM

STEP	CHECK	YES	NO
1. CHECK ACCELERATOR PEDAL POSITION SENSOR OUTPUT.1)Turn the ignition switch to ON.2)Measure the voltage between ECM connector and chassis ground.ConnectorterminalMain accelerator pedal position sensor signal(E134) No. 29 (+) — Chassis ground (−):Sub accelerator pedal position sensor signal(E134) No. 31 (+) — Chassis ground (−):	Is the difference in measured values for the main accelerator pedal position sensor signal and the sub accelerator pedal position sensor signal 0 V-	Diagnostic Procedure with Diagnostic Trouble Code (DTC)DTC P2138 THROTTLE/PEDAL POSITION SENSOR/SWITCH ‘D’/’E’ VOLTAGE CORRELATION	Diagnostic Procedure with Diagnostic Trouble Code (DTC)DTC P2138 THROTTLE/PEDAL POSITION SENSOR/SWITCH ‘D’/’E’ VOLTAGE CORRELATION
2. CHECK ACCELERATOR PEDAL POSITION SENSOR OUTPUT.1)Measure the voltage between accelerator pedal position sensor connector and chassis ground.Connectorterminal(B315) No. 6 (+) — Chassis ground (−):(B315) No. 3 (+) — Chassis ground (−):	Is the difference in measured values for the main accelerator pedal position sensor signal and the sub accelerator pedal position sensor signal 0 V-	Replace the accelerator pedal.Accelerator Pedal	Repair the harness and connector.NOTE:In this case, repair the following item:Open circuit of harness between ECM connector and accelerator pedal position sensor connectorShort circuit to ground in harness between ECM connector and accelerator pedal position sensor connector
3. CHECK HARNESS BETWEEN ECM AND ACCELERATOR PEDAL POSITION SENSOR CONNECTOR.Measure the resistance of harness between accelerator pedal position sensor connector and chassis ground.Connectorterminal(B315) No. 5 — Chassis ground:(B315) No. 2 — Chassis ground:	Is the resistance less than 5 –	Repair the poor contact of ECM connector.	Repair the harness and connector.NOTE:In this case, repair the following item:Open circuit of harness between ECM connector and accelerator pedal position sensor connectorOpen circuit of harness between ECM connector and engine groundPoor contact of ECM connectorPoor contact of joint connector

1) Verify that the connector at the throttle/pedal is firmly attached by checking the Subaru throttle/pedal wiring diagram. Follow the steps outlined below to conduct circuit testing. 2) Using a digital multimeter, back probe the terminals 3 (Green/black) and 1 (White/blue) to check for continuity. A 5-volt reference voltage should be seen (key in RUN position). Check the circuit back to the ECM if this is not the case. Ground should be probed through terminals 4 (blue) and 6 (black/white). When testing for voltage loss, you should see something less than 0.05 volts.

• Then, disconnect the connector from the throttle/pedal and measure the resistance across terminals 3 (green/black) and 4 (red/black) (Blue).
• The resistance values between terminals 1 (White/blue) and 6 (Black/white) should be checked.
• Readings between 500 and 2500 should be taken.
• Look for 280 to 1680-pixel resolution.
• 200-800 should be displayed on terminals 4 (blue) and 5 (black).

Replacement of the throttle/pedal is necessary if the readings are not within specifications 2020, a year of rebirth Rick Muscoplat is a songwriter and musician from the United States. Rick Muscoplat wrote a post on

(1)	Engine control module (ECM)	(3)	Accelerator pedal position sensor 2 signal	(4)	Accelerator pedal position sensor
(2)	Accelerator pedal position sensor 1 signal

3.CONDITIONS FOR EXECUTION

Secondary Parameters	Execution condition
Battery voltage	≥ 6 V

4.GENERAL DRIVING CYCLE (G-DRIVE) Always carry out the diagnostic in a continual fashion. MODEL OF DIAGNOSTIC ANALYSIS If the period of time during which the following requirements are satisfied is more than the time given, the judge should be assigned the letter NG. Value of Judgment

Malfunction Criteria	Threshold Value
Signal difference between two sensors	Within NG range ofDetails of Judgment value

Specifications of the Judgment Value

(X1)	0.6°	(X2)	1.2°	(X3)	2°
(X4)	4°
(Y1)	1.465°	(Y2)	1.597°	(Y3)	1.663°
(Y4)	2.455°	(Y5)	3.116°

Time Needed for Diagnosis: 116 msMalfunction Indicator Light Illumination:Illuminates as soon as a malfunction occurs.

Other materials:

Operation 1. On the «Start» screen, pick the option «Diagnosis». 2. On the «Car selection» screen, enter the details about the target vehicle and click on «Confirmed». 3. On the «Main Menu» screen, pick «Each System» from the drop-down menu. 4. On the «Pick System» screen, select «Headlight / Foglight» and then press the «Enter» button. 5. In the case of «Sele.

Subaru Crosstrek Service Manual – Dtc p2138 throttle/pedal position sensor/switch ‘d’/’e’ voltage correlation

ENGINE DIAGNOSTICS ENGINE DIAGNOSTICS (H4DO) Diagnostic Procedure with Diagnostic Trouble Code (DTC)DTC P2138 THROTTLE/PEDAL POSITION SENSOR/SWITCH ‘D’/’E’ VOLTAGE CORRELATION THROTTLE/PEDAL POSITION SENSOR/SWITCH ‘D’/’E’ VOLTAGE CORRELATION THROTTLE/PEDAL POSITION SENSOR/SWITCH ‘D’/’E’ VOLTAGE CONDITION DETECTED BY THE DTC: When a problem is identified, action is taken immediately. TROUBLE SYMPTOM: Improper idling of the vehicle Unsatisfactory driving performance CAUTION: After servicing or replacing problematic parts, run the Clear Memory ModeClear Memory ModeOPERATION thereafter to ensure that no data is lost ‘, as well as Inspection Mode PROCEDURE FOR INSPECTION MODE ‘.

• CHECK THE OUTPUT FROM THE ACCELERATOR PEDAL POSITION SENSOR.
• 2)Take a voltage reading between the ECM connection and the chassis ground.
• 23 (+) • Chassis ground (B135) No.
• • Chassis ground (B135):Is the difference in measured values for the main accelerator pedal position sensor signal and the sub accelerator pedal position sensor signal zero volts?
• 2.
• 1) Measure the voltage between the connection for the accelerator pedal position sensor and the chassis ground.
• 6 (+) — Chassis ground (): Connectorterminal(B315) No.

3 (+) — Grounding of the chassis (): Are there any measurements that show a discrepancy between the observed values for the main accelerator pedal position sensor signal and the sub accelerator pedal position sensor signal?

Pedal for the Accelerator’ Repair the harness and connector if they are damaged.

In the harness between the ECM connector and the accelerator pedal position sensor connector, there is a short circuit to earth.

The resistance of the harness between the connection for the accelerator pedal position sensor and the chassis ground should be measured.

5 — Chassis ground: Connectorterminal(B315) No.

5 — Chassis ground: Connectorterminal(B315) No.

Make repairs to the ECM connector’s faulty contact.

NOTE:In this instance, the following item should be repaired: The harness between the ECM connector and the accelerator pedal position sensor connector has an open circuit.

Insufficient contact between the ECM connection and the joint connector 1.SUMMARY OF THE DIAGNOSIS When the signal level of the accelerator pedal position sensor 1 differs from the signal level of the accelerator pedal position sensor 2, the judgment is NG. DESCRIPTION OF THE COMPONENTS

(1)	Engine control module (ECM)	(3)	Accelerator pedal position sensor 2 signal	(4)	Accelerator pedal position sensor
(2)	Accelerator pedal position sensor 1 signal

3.CONDITIONS FOR EXECUTION

Secondary Parameters	Execution condition
Battery voltage	≥ 6 V

4.GENERAL DRIVING CYCLE (G-DRIVE) Always carry out the diagnostic in a continual fashion. MODEL OF DIAGNOSTIC ANALYSIS If the period of time during which the following requirements are satisfied is more than the time given, the judge should be assigned the letter NG. Value of Judgment

Malfunction Criteria	Threshold Value
Signal difference between two sensors	Within NG range ofDetails of Judgment value

Specifications of the Judgment Value

(X1)	0.6 x00B0;	(X2)	1.2 x00B0;	(X3)	2 x00B0;
(X4)	4 x00B0;
(Y1)	1.465 x00B0;	(Y2)	1.597 x00B0;	(Y3)	1.663 x00B0;
(Y4)	2.455 x00B0;	(Y5)	3.116 x00B0;

Time required for diagnosis: 116 milliseconds The Fault Indicator Light will illuminate as soon as a malfunction is identified.

Other materials:

Replacement The differential side retainer oil seal is located on the differential side of the manual transmission and differential (5MT). REPLACEMENT Start by disconnecting the ground line from the battery. 2. Remove the front tires from the vehicle. 3. Raise the vehicle to its full height. 4. Remove the drain plug from the transmission gear oil using the TORX® bit T70 and allow the oil to drain fully. Removal of the HVAC SYSTEM (HEATER, VENTILATOR, AND A/C)Control Panel (with caution). REMOVALCAUTION:Before handling the airbag system components, refer to the ‘CAUTION’ section of the ‘General Description’ in ‘AIRBAG SYSTEM’ for further information on safety precautions.

• Disconnect the ground line from the power source.
• REMOVAL 1.
• ‘NOTE’: Remove the air intake boot from the air intake.
• 2016-2022 is a five-year period.

P2138 DTC Throttle/Pedal Pos Sensor/Switch D

Replacement The differential side retainer oil seal is located on the differential side of the transmission. REPLACEMENT Start by disconnecting the battery’s ground line. 2. Take the front tires off the vehicle. 3. The vehicle should be raised. Drain the transmission gear oil fully by removing the drain plug and using the TORX® bit T70. 5. Removal of the HVAC SYSTEM (including the heater, the ventilator, and the air conditioner)Control Panel REMOVALCAUTION:Before handling the airbag system components, refer to the ‘CAUTION’ section of the ‘General Description’ in the ‘AIRBAG SYSTEM’ for further information on how to avoid injury.

• Disconnect the ground connection from the power source.
• Removal of the VEHICLE DYNAMICS CONTROL (VDC), the VDC Control Module, and the Hydraulic Control Unit (VDCCM H/U).
• 2 REMOVE THE AIR INJECTION BOOT’ NOTE’ a boot for the air intake CAUTION: Before removing the intake boot, make sure that it is completely clear of any debris.
• Copyright

What does that mean?

This diagnostic problem code (DTC) is a general powertrain code that may be seen on many vehicles. Although particular repair processes may alter significantly depending on the model, it is called general since it applies to all makes and models of automobiles manufactured after 1996. It is possible that the throttle will not open and shut properly if the throttle/pedal position sensor/switch D/E voltage correlation is set in the automotive trouble codeP2138. In the 1990s, vehicle manufacturers began using ‘Drive by wire’ throttle control technology on a large scale across the industry.

Previously, the vehicle’s throttle was operated by a simple cable that connected the gas pedal directly to the throttle.

When the throttle is moved or positioned, the TPS transforms it to a voltage signal, which is then sent to the engine management computer, which utilizes the fluctuating voltage signal to formulate an engine management plan.

Although the code has the same frame of reference as the other codes, the wording on certain manufacturers is significantly different, such as ‘Throttle position sensor circuit range/performance’ on an Infiniti or ‘Electronic throttle control system malfunction power management’ on a Hyundai, for example.

• As a result, the computer transmits a voltage to the electric motor, which causes the throttle plate to be released.
• An illustration of a throttle body; the throttle body position (TPS) sensor is shown in the lower right corner of the image.
• When both voltages are in agreement, the system is in proper working order.
• Additional difficulty codes may be generated in conjunction with this code, which will help to pinpoint the source of the problem.
• Here is a shot of an accelerator pedal, complete with sensor wire attached to its surface: Panoha (Own work) provided permission for use of his photograph, which was obtained from Wikimedia Commons.

NOTE: Because this P2138 DTC is essentially the same as the P2135, P2136, P2137, P2139, andP2140 codes, the diagnostic procedures for all of them will be the same.

Symptoms

The symptoms of a P2138 code might include stalling when you come to a complete stop, absolute lack of power, no acceleration, rapid loss of power at cruise speeds, and a locked throttle at the present engine rpm, among others. In addition, the check engine light will illuminate, and a code will be assigned to indicate the problem.

Potential Causes of P2138 DTC

• The wire connector or ‘pig tail’ on the throttle body, in my experience, frequently causes issues in the form of a weak connection. The female terminals on the pigtail get corroded or slide away from the connection, resulting in a short circuit. It is possible that a bare wire on the pigtail has shorted to ground. A distortion in the top cover of the throttle body prevented the gears from rotating properly. The electronic throttle body has developed a malfunction. The accelerator pedal sensor or its wiring did not function properly. The engine management computer has had a failure. In order to restore active responsiveness to the throttle body, the computer must be cycled through its relearn phase, or the computer must be reprogrammed by a dealer. The TPS sensors were not correlating for a few seconds.

Diagnostic / Repair Steps

Here are a few items to consider with the electronically controlled throttle. This system is more delicate and subject to damage than any other system, and it is also the most expensive. Treat it and all of its components with utmost caution. It only takes one spill or one harsh treatment to make it unusable. The throttle body contains all of the other components, with the exception of the sensor for the accelerator pedal. When you look closely at the throttle body, you will discover a flat plastic cover on the top of it.

The motor is equipped with a tiny metal gear that protrudes from the housing behind the cover.

The centering and supporting pin for the gear is inserted into the throttle body housing, while the top pin is inserted into the ‘thin’ plastic cover.

• The first step is to go online and look for the TSBs (technical service bulletins) for your car that are related to the code you received. These Technical Service Bulletins (TSBs) are the outcome of consumer complaints or acknowledged defects, as well as the factory advised repair process. Consult an online service handbook or a computer repair manual for information on a possible relearn technique to reset the machine. For example, on a Nissan, start the engine and wait three seconds before continuing. Pushing and releasing the pedal five times in succession during the following 5 seconds will count as one rep. Ten seconds after pressing the pedal, release it and hold it for another seven seconds. Release the accelerator pedal when the check engine light begins to blink. Wait 10 seconds, then depress the pedal for another 10 seconds before releasing it. Remove the key from the ignition
• Remove the electrical connector from the throttle body by pulling it out. Take a close look at it to see if there are any missing or twisted female terminals. Look for signs of corrosion. Using a little pocket screwdriver, remove any rust that has formed. Connect the wires by putting a little quantity of electrical lubricant on the terminals and reconnecting them. You may get a replacement ‘pigtail’ at most auto parts stores or from the dealer if the terminal connector has been twisted or has missing pins, and you should check the top cover of the throttle body for cracks or warping. If any are present, contact the vendor and inquire as to whether they offer only the top cover. n If this is the case, the throttle body should be replaced. Probe the accelerator pedal sensor with a voltmeter to determine its voltage. It will have a reference voltage of 5 volts and a changing signal adjacent to it. Start by turning the key in the ignition and carefully depressing the pedal. The voltage should gradually increase from.5 to 5.0 without interruption. If the voltage spikes or if there is no voltage at the signal wire, it should be replaced
• Look online for the wire terminal identification on the throttle body of your car, which may be found on the throttle body. Check for power to the throttle motor by probing the throttle body connector. Helper should turn the key on and softly push the accelerator pedal. If there is no power available, the computer is at fault. If there is power, this indicates that the throttle body is faulty.

Other DTCs associated with the throttle include: P0068, P0120, P0121, P0122, P0123, P0124, P0510, and more.

Related DTC Discussions

• P2138 throttle/pedal positioning sensor switch d/e voltage correlation is a Nissan Titan code that appears in 2006. A p2138 error code was shown on my 2006 Nissan Titan, which had 128000 miles on it. I tried changing the throttle body, but nothing worked
• I tried changing the acceleration pedal, but nothing worked
• I hit a pothole while driving, and the engine light came on, giving me a p2138 throttle/pedal positioning sensor switch d/e voltage correlation
• I tried changing the throttle body, but nothing worked. Code P2138 for the 2007 Grand Prix. Greetings to everyone. I have a 2007 Pontiac Grand Prix with a sunroof, and the vehicle is displaying the code P2138. Apparently, this has been going on for about a year now. When driving in heavy rain or extremely slick road conditions, the Reduced Engine Power warning will appear along with the check engine light on the dashboard. This only occurs when the da is wet, and never when the da is dry. Trailblazer P2135, P2138, P300, P303 (2004 model year) I’m experiencing some issues with my 2004 Trailblazer and am hoping that someone can put me in the correct route to resolve the situation. I’ve had the truck for nearly 2 years and have had no problems with it at all. It’s been a fantastic vehicle to drive. Approximately three weeks ago, I pulled out of the driveway and noticed a dash light that said ‘Reduced
• 2018 Silverado DTC P2138 – Stranded three times so far.’ For the first time, I replaced the accelerator pedal with a sensor. The ECM was replaced for the second time. So, what do you do now? Is it necessary to replace the throttle body and its sensors? Is there anyone who can assist me?
• P2138 decreased the number of engine difficulties My check engine light is illuminated, and it indicates that the engine power has been lowered. I adjusted the gas pedal because the codes said p2138. Is there anything else I need do after I’ve cleared the codes but before I start the vehicle? I’m aware that some cars must perform specific tasks in order to ensure that the environment is clear and safe before starting their vehicles. Thank you so much
• Acura TL Error Codes from 2006 P0134 P2251 P2138 P0134 P0134 P0134 Acura TL (3.2) from 2006
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• P2138 application I have a 2005 Trailblazer with the numbers p0641, p2138, and p2135 on the dashboard. My accelerator pedal, throttle body, and new wires from the throttle body have all been replaced
• Nonetheless, the vehicle is still in limp mode. Do you have any other suggestions? The following pilot 2005 numbers: P0137, P2138, P0300, P0302 through P0306 Hello, In the last few months, we’ve had a number of problems with our 2005 Honda Pilot. I went out and bought an OBD reader, and the following codes were shown (the majority of which were cylinder misfires): P0137 O2 Sensor Circuit Low Voltage Bank 1 Sensor 2 P0137 O2 Sensor Circuit Low Voltage P2138 Throttle/Pedal Position Sensor/Switch D/E Voltage Correlation P2138 Throttle/Pedal Position Sensor/Switch D/E Voltage Correlation Code P2138 on a 2009 Chevrolet Impala with the P03 code. My 2009 Chevrolet Impala suffered ‘traction control not functional’ for almost 1 mile, resulting in a significant loss of power. The ‘P2138’ code was stored when I shut off and restarted the engine, however it was cleared after around 50 miles. Everything has returned to normal. What am I supposed to do? What should the dealer do in this situation? This is an example of
• P1125, P2138, and P2125 are the base model codes for the 2006 Pontiac Grand Prix. Hello, I’ve been experiencing problems with my 2006 Pontiac Grand Prix, which has been throwing the codes listed above. Even though I’ve rebuilt the throttle body and the pedal assembly, as well as discovered some exposed wires in the engine compartment (which I repaired), the problem continues to exist. Is there anything else that might be done to solve this?

Need more help with a p2138 code?

P2138 throttle/pedal positioning sensor switch d/e voltage correlation is a code that appears on the 2006 Nissan Titan. A p2138 error code was shown on my 2006 Nissan Titan with 128000 miles. It didn’t help that I struck a pothole while driving and the engine light came on, telling me that the throttle/pedal location sensor switch d/e voltage correlation was incorrect. I changed the throttle body, but it didn’t help, and I changed the acceleration pedal, but that didn’t help either. Code P2138 for the seventh Grand Prix.

1. In my 2007 Pontiac Grand Prix with sunroof, the P2138 error number is shown.
2. When driving in heavy rain or extremely slick road conditions, the Reduced Engine Power warning will appear along with the check engine light on the dash.
3. Trailblazer P2135, P2138, P300, P303 (2004 model year).
4. My truck has been in my possession for almost 2 years; I have experienced no difficulties and it has been a pleasure to drive.
5. After a few attempts, I was able to successfully replace the accelerator pedal with sensor.
6. The next step is to.
7. Is there anything I can do to assist you?

The codes read p2138, and I modified the gas pedal to accommodate this information.

In my experience with particular vehicles, specific procedures must be followed in order to ensure that the road is clean and safe for them to drive.

Misfires on the 2006 Acura TL P0134 P2251 P2138 P0134 P0134 P0134 P0134 Acura TL (3.2), 2006 Acura TL There is no Sports Package with this vehicle.

The other day I was having automotive difficulty; when I squeezed the gas pedal, my car barely moved at all.

My accelerator pedal, throttle body, and new wires from the throttle body have all been replaced; nonetheless, the vehicle is still in limp mode.

The following P0137, P2138, P0300, P0302 through P0306 are pilot 2005 flight numbers: Hello, This year, our 2005 Honda Pilot has been causing us a lot of problems.

The ‘P2138’ code was stored when I shut off and restarted the engine, however the code was removed after around 50 miles of driving.

And what should I do now, you ask?

I am referring to the following: Model codes P1125, P2138, and P2125 for the 2006 Pontiac Grand Prix base models.

I’ve rebuilt the throttle body and pedal assembly, as well as discovered and repaired several loose wires in the engine area, but the problem continues. Is there anything further that might be done to help?

P2138 code – Diagnose and Fix It Like a Mechanic

It appears that your Check Engine light is illuminated, and you have a code P2138, which stands for ‘Throttle/Pedal Position Sensor/Switch D/E Voltage Correlation.’ What exactly does this mean? In this video, our technician deconstructs the P2138 code, its symptoms, which include poor acceleration and decreased power mode, and demonstrates how to identify the various causes so that you can determine what to do to clear the code on your vehicle. Now is a good time to watch:

Check Engine Light? Weak Acceleration or Reduced Power – Code P2138

Would you want to see more videos like this? To see hundreds of automotive diagnostic and how-to videos, please visit our video collection.

What is code P2138 and what does it mean?

Code P2138 is a sensor code for either the accelerator pedal position (APP) sensor or the throttle position (TP) sensor. In layman’s words, it’s an OBD2 code that’s set when one of the two sensors in your gas pedal fails to operate properly. APP (Accelerator Pedal Position) sensors are located on either side of the gas pedal, as shown by our mechanic in the video above (1:07). These sensors effectively function as fail-safes for one another in the event that one sensor produces an error signal.

It is vital to understand that these sensors will not all produce exactly the same data; rather, the data from each sensor must correlate with the data from the others and fall within a particular range.

If you notice a significant spike or dip from a single sensor, you’ll know which sensor is causing the P2138 code to be triggered.

Can I drive with P2138, or is it too serious?

We recommend that you fix the problem that is producing P2138 as soon as possible. When this code is activated, your automobile may have difficulty accelerating or may enter reduced power mode, which serves as a warning that driving with P2138 is not a good idea.

What are typical P2138 symptoms?

Among the symptoms of the P2138 error code are:

• Your Check Engine light may be on
• You may be experiencing trouble accelerating
• And your Engine Reduced Power light may illuminate. Simply expressed, this signifies that your car’s computer (powertrain or engine control module) has placed your vehicle in a safe mode in order to minimize strong acceleration or high speeds since code P2138 was activated

What causes a P2138 code?

P2138 can be caused by a variety of factors, including:

• Failure, malfunction, or contamination of the APPorTP sensor
• An APP or TP sensor connection that is damaged, bad, loose, or not attached
• APP or TP sensor wiring or circuits that are faulty or damaged
• On the APP or TP sensor connection, the incorrect dielectric grease has been applied. A problem with the computer

How do I diagnose P2138?

1. Use an ascan toolor code reader that graphs data to discover which APP sensor is causing P2138 to be triggered.

While the engine is running and the vehicle is in Park, softly push the gas pedal while keeping an eye on the graph on the scan tool to ensure that the data does not drop or spike dramatically (1:59 in the video above). If there is a spike or a dip in the data, you will know that something is amiss with that specific sensor. The sensor may not be functioning properly because it is dusty or has a poor connection, in which case the pedal will need to be replaced entirely. Certain scan tools feature an option called ‘Agree or Disagree,’ which tells you if the data from the two APP sensors ‘agrees’ or ‘disagrees,’ depending on the situation.

If the data changes, it suggests that the problem is with the pedal itself, rather than with the sensor cables that connect it.

1. Make a visual inspection of the APP sensor connector and wires for damage, fraying, or disconnection, as well as the use of the incorrect dielectric grease.

Make a visual inspection of the APP sensor connector and wires for damage, fraying, or disconnection, as well as the use of the incorrect type of dielectric grease

1. Check the sensor connector wire using a multimeter to see if there is a break in the wiring.

Examine the sensor connector wires for breaks that might result in the P2138 code being triggered using a multimeter and setting the meter dial to the ohms setting (which our mechanic described as appearing like a little horseshoe). In the video above, at 4:03, our mechanic demonstrates how to accomplish this.

1. Test the sensor and pedal connector terminals using a multimeter to see if any wires are defective or damaged.

Using a tiny flat-edged instrument, such as a screwdriver, carefully pry the covers off of both connections while the ignition is turned off first (5:11). Beginning at 5:36, our mechanic demonstrates how to test the APP sensor and pedal connector terminals with a multimeter. If one wire’s reading is much greater than another’s, this suggests that something is amiss with the circuit, and you should investigate more. To test a circuit, change the dial on the multimeter from ohms to direct current voltage.

In addition, be certain that your battery has 12 volts before doing this test.

Starting at 7:00 p.m., our mechanic will teach you through how to do this test, which should assist you identify any potential wire breakage that need to be fixed.

How do I fix P2138?

If any of these tests reveal that the P2138 code is caused by a problem with a particular part or component, you will need to repair or replace that component or component (e.g. Replace theaccelerator pedalor one of the connectors, or repair faulty wires).

Video: How To Replace Accelerator PedalPosition Sensor

• Scan tool includes a ‘Agree or Disagree’ option as well as graphing capabilities. Multimeter
• A screwdriver with a flat head

Need other parts mentioned in this article? Shop now:

• Sensors for the accelerator pedal position (APP) and the throttle position (TP).

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The P2138 code is a diagnostic and repair tool that may be used by mechanics to diagnose and repair a variety of problems. In this video, our mechanic explains the P2138 code (‘Throttle/Pedal Position Sensor/Switch D/E Voltage Correlation’) and demonstrates how to diagnose and repair it. The Author1A Auto TeamPublisher Name1A AutoPublisher Logo are trademarks of Author1A Auto TeamPublisher.