P2127 Chevrolet or P2138 Chevrolet?


  • the p2127 code is an Accelerator position sensor (low input) as is the p(2138) could be moisture or debris in harness plugs. Try using dielectric grease. Read full answer

How do I fix error code P2127?

What repairs can fix the P2127 code?

  1. Repair or replacement of the wiring harness for the throttle position sensor or pedal position sensor.
  2. Throttle/Pedal position sensor E replaced.
  3. Fixing the intermittent electrical connection.
  4. ECM replacement if required.

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.

Can I drive with 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.

Where is the throttle pedal position sensor located?

A throttle position sensor (TPS) is a sensor used to monitor the air intake of an engine. The sensor is usually located on the butterfly spindle/shaft, so that it can directly monitor the position of the throttle.

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.

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 much does a throttle position sensor cost to replace?

The average replacement cost for the throttle position sensor is anywhere from $110 to $200. The parts cost is anywhere from $75 to $105 while the labor cost is anywhere from $35 to $95.

What does P2138 mean?

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 gas pedal 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.

What causes throttle position sensor failure?

Code errors can cause your throttle position sensor to work erratically or incorrectly. Otherwise, you’ll need professional software to reprogram your sensor. This job is best done by a professional mechanic. If your sensor just needs repairs, it could be the result of faulty or loose wiring.

How do you test a GM TPS sensor?

Touch the negative probe on the multimeter to the negative wire tab on the TPS and the positive probe to the positive tab. The multimeter will display around 5 volts if the TPS is working correctly. Check signal voltage. Touch the positive probe to the signal wire tab and touch the ground probe to the frame of the car.

Do you have to reset computer after replacing throttle position sensor?

After replacing the throttle body to your engine, if the engine light was on and has a pending code, the code will go away. If the code was a hard permanent code, then the ECM (computer) would need a hard reset. The engine light will go out and clear all codes as it goes into a learn cycle.

See also:  Power steering noise Ford?

P2127 Chevrolet or P2138 Chevrolet

Shops are reporting a high occurrence of P2127 Chevrolet trouble codes and P2138 Chevrolet trouble codes, and the problem might be caused by a wire harness issue at the accelerator pedal position sensor or at the throttle body, according to the manufacturer. You shouldn’t instantly think the components are defective unless you enjoy flinging parts around like a crazy person.

Read more

Here are the codes and the criteria for setting:

P2127- Accelerator Pedal Position (APP) Sensor 2 Circuit Low Voltage is the definition of the code. Criteria: The ECM detects that the voltage of the APP sensor 2 is less than 0.325 volt for a period of greater than 0.4 second in the ECM. P2138- Accelerator Pedal Position (APP) Sensor 2 Circuit Low Voltage is the definition of the code. Criteria: The voltage difference between APP sensors 1 and 2 surpasses a preset value for a period of more than 2 seconds between the two sensors. Assembly for measuring the location of the accelerator pedal Here’s what you should search for according to the troubleshooting section of the shop manual: Sensor 1 of the APP Code for the signal: If you have the code P2138, look for high resistance on the board.

If you have the code P2138, look for high resistance on the board.

  1. If you have the code P2138, look for high resistance on the board.
  2. If you have the code P2138, look for high resistance and low resistance.
  3. Sensor 2 (5-Volt Reference) for APP Short to Ground should be checked if you have the code P2127.
  4. If you have the code P2127, look for a short in the circuit.
  5. Testing values for P2127 and P2138 are as follows: Signal from APP Sensor 1: Short to ground would read 0V, open or high resistance would read 0V, and short to voltage would read 5V.
  6. Sensor 1 of the APP (five-voltage) Reference: Short to ground would read 0V, open or high resistance would read 0V, and short to voltage would read 5V.
  7. APP Sensor 1 Low Reference: The normal range is 0.33-4.75V – 4.96V.
  8. APP Sensor 2 Signal: The normal range is 0.33-2.50V; a short to earth would result in a reading of 0V; an open or high resistance would result in a reading of 0v; a short to voltage would result in a reading of 5V.
  9. A short to ground would read 0V, an open circuit or high resistance would read 0v, and a short to voltage would read 5V, respectively.
  10. The normal resistance range is: 0.33-2.50 V, whereas open or high resistance would read 4.92 VI, respectively.

If there is no problem discovered, investigate C109/X109 and C205/X205 for the following issues that may be present: GM has published a service bulletin on this issue, and the bulletin recommends that the following things be checked:

  • Keep an eye out for connection halves that aren’t correctly positioned. Corrosion and/or water ingress are examples of corrosion. Unseated APP circuit terminals
  • APP circuit terminals that are not seated properly. APP circuit terminals with low terminal tension may be identified and tested using the appropriate terminal test probes. APP circuit terminals that have not been properly crimped
  • And

Check connection C109/X109, which is situated on the left side of the engine compartment, below the underhood fuse block, to see whether it is damaged. Underneath the Upper Instrument Trim Panel, identify connection C205/X205 for inspection. To get access to C205/X205, complete the Replacement Procedure for the Instrument Panel Upper Trim Panel with Windshield Defroster Nozzle Grille in SI, which may be found here. As a result of the stretched harness, shops are reporting wire breakage at the application processor and the electronic throttle body.

(2016);, 2016; Rick Muscoplat is a professional musician.

P2127 Throttle Position Sensor E Circuit Low Input

Low input from the throttle/pedal position sensor/switch ‘E’ circuit

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. If you receive a P2127 code, it implies that the computer in your automobile has identified that the TPS (throttle position sensor) is reporting an abnormally low voltage. Some cars have a lower limit of 0.17 – 0.20 volts, while others have a higher maximum (V).

See also:  Open end versus closed end lease?

Did you make any adjustments when you first put it in?

An open or a short to ground in the signal circuit might be the cause.


Symptoms may include any of the following:

  • Stalling, surging, and no or little acceleration are all possible indications
  • Additional symptoms may also be present.


One or more of the following events may have occurred when the code P2127 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 following are some recommended troubleshooting and repair procedures:

  • Check the throttle position sensor (TPS), wiring connector, and wiring for breaks, frayed wires, and other defects. If required, repair or replace the item. Make sure the voltage at the TPS is correct (refer to a service manual for your vehicle for specific information). If the voltage is too low, it is a sign that there is a malfunction. If required, replace the item. If the TPS has been recently changed, it may be necessary to make adjustments. The TPS may need to be correctly aligned or modified during the installation process on some cars, so check the installation instructions or contact a repair manual for more information. For some who have no symptoms at all, the problem may be intermittent, and deleting the code may temporarily alleviate it. This indicates that you should thoroughly inspect the wiring to ensure that it is not rubbing against anything, is not grounded, and so on. It’s possible that the code will reappear.

Related DTC Discussions

  • Code P2127 for a 2005 Hyundai Santa Fe P2127 is displayed on the dashboard of my 2005 Hyundai Santa Fe 4WD with a 3.5-liter engine. It will turn, but it will not catch, and it will not begin. Can somebody point me in the direction of the actual source of the problem? Please and thank you very much. Nissan Sunny 1.6 P2138, P1229, P2127, and P2122 Nissan Sunny 1.6 My Nissan Sunny 1.6L 2010 has an unresponsive throttle that I’m having trouble with. I received the following codes: P2138, P2127, P2122, and P1229 Changed the position sensor for the accelerator pedal, however it is still not responsive
  • P2127 error code on a 2004 Dodge Ram 2500 diesel I was having battery issues, so I changed both of them. Now I’m getting P2127 errors (Throttle/pedal position sensor switch E circuit low). Do you have any recommendations, or do you think this TPS is bad and has to be replaced?

Need more help with a p2127 code?

If you still need assistance with the P2127 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.

O4 bravada p2127 p2138

Additionally, in the case that it’s* not possible to get your hands on a scan tool, etc., everything Tech II indicated above is applicable: Psyhospike first posted this message. When I depress the accelerator pedal, the vehicle does not accelerate or do anything at all. It will crank an idle like it is meant to, but that’s all there is to it. This informs me that the PCM is capable of bringing the vehicle to a stop and that the throttle plate is properly placed to accomplish this. The accelerator pedal position sensor or the throttle assembly may be malfunctioning if you press the accelerator pedal and get no response from the car when you do so.

See also:  Replace a timing belt?

In such situation, it would remain idle until instructed to perform anything else.

In this case, the engine might be sitting there frozen in place at the position it was in just before the engine was switched off the last time it ran before failing.

Either that or it could be opening it just enough to get the engine started and then thinking, ‘Uh oh, I can’t see where it is, I’ll go into a protected state where I’ll keep the engine running but not do anything else for fear of placing the throttle plate incorrectly and causing bigger problems, damage, or safety concerns.’ Fortunately, you’ve done your research and found the following codes: Psyhospike first posted this message.

When I scanned it, I received two codes: p2127 and p2138.

Assuming the throttle motor is not failing and therefore unable to place the throttle plate as instructed, or (2) the throttle motor is fine, but the TPS is reading incorrectly, this means that the throttle motor is capable of placing the plates accurately, but that there is no useful information from the TPS to provide to the PCM as a result of the throttle motor’s ability to do so.

According to parts listings on the internet, it appears that your vehicle has the TPS merged with the throttle body component.

Assuming those are in decent condition, I’d suggest taking a chance on replacing the throttle body (with its integrated TPS). It’s a $150.00-$200.00 bet, but it appears to be the most plausible suspect based on everything I’ve seen so far.

Limp mode w codes p2127 & p2138 – 2017 zr2 diesel

So, just to keep everyone up to date in case anyone else is experiencing the same issue. I went over the areas where the chaffing was a problem. Apparently, a standoff has been installed on the bellhousing of my truck, which is a recent modification. There was a near-failure in the drivers side wheel well due to the harness rubbing on an auxiliary power wire. It had progressed to the point where it had etched grooves into the metal but had not yet entered the harness. With a few well-placed zip ties, this shouldn’t be an issue.

  • The cause of my problem was found to be an excessive buildup of carbon and soot in the throttle body.
  • According to the investigation, the throttle plate movement was obstructed occasionally just enough to generate a voltage mismatch between the position of the gas pedal and the actual position of the throttle body.
  • I’ve put around 150 miles on it and haven’t had any problems.
  • Thank you so much for your assistance!

Lmm p2122 code

When the symptoms lead directly to a certain part, part switching is a totally appropriate method of diagnosing the problem. Unfortunately, some individuals get it into their heads that someone else had a similar problem, and X cured it, thus X will also fix this problem. This is not the case. Then a large number of parts are replaced, resulting in a waste of resources. My knowledge of sensors does not include any instances in which one sensor has shared a signal cable with another sensor. Everything I’ve ever seen has distinct wiring connecting it to the PC it’s connected to.

If the data bus goes down for whatever reason, it should be noticed and a U code should be set to indicate that it has happened.

What I’ve observed on several occasions is that a 5 volt power connection and a ground wire to the computer are shared by a number of sensors.

The same may be said for the ground.

Most of the time, simply disconnecting the other sensors will restore function to the sensor that has been tripped.

Leave a Comment

Your email address will not be published. Required fields are marked *