P2126 OBD Error Code: Problem & Solutions

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Stressed? Can’t comprehend the error code P2126? No worries, this Parts Avatar guide is all you need to crack the error code. The OBD-II P2126 is diagnostic trouble code that indicates a malfunction in the range/performance E circuit of the throttle/pedal position sensor switch. It should be noted that engines for running smoothly require the right amount of air and fuel. The air enters the engine when the accelerator pedal opens the throttle plate (it is pressed down). The powertrain control module (PCM) receives information from the accelerator pedal position sensor (APP) through voltage signals. These voltage signals command the opening of throttle body plate (how much they should open). The code P2126 is stored by the powertrain control module when the APP sensor fails to function correctly. The check engine light illuminates too.

The accelerator pedal position (APP) sensor located on the accelerator pedal identifies the angle of the accelerator pedal. It is notable that this sensor built is controlled electronically and uses hall-effect elements. In this accelerator pedal position sensor, the voltage charged to terminals VPA and VPA2 of the engine control module (ECM) varies from 0V to 5V in correspondence to the angle of the accelerator pedal. The engine control uses the VPA signal to indicate the actual accelerator pedal angle. Also, the VPA is utilized to detect the errors of the sensor too.

What causes this problem with the Throttle Position Sensor E Circuit Range/Performance?

• A damaged APP sensor
• Loose or short circuited APP sensor harness
• Broken or loose APP sensor wiring
• A weak electrical connection in the APP sensor circuit
• APP sensor connector having signs of corrosion or bent pins
• A distorted throttle actuator control motor
• A faulty throttle position (TP) actuator
• Malfunctioning TP sensor
• Burnt, open or short circuited wiring or connectors in the throttle actuator motor
• Open control module ground strap or a damaged ground wire
• A defective PCM 

1. Accelerator pedal position sensor - Experiencing an inconsistency in the engine response? Or a reduced fuel efficiency? Well, it could all be due to a faulty accelerator pedal position sensor. In addition to these, the driver is likely to observe an illuminated check engine light too. Tune into Parts Avatar now!
2. Throttle control motor - A distorted throttle control motor can end up being the chief host inviting the error code P2126. Not only this you are likely to notice unexplained inconsistencies with the throttle body too. So replacing one can be one of the wisest decisions to avoid a problematic system.
3. Throttle position sensor - Lack of power? No acceleration in the vehicle? Difficulty to maintain an optimum fuel efficiency? We recommend you to change your throttle position sensor immediately if you wish to avoid the problems caused by the error code P2126.
4. Throttle position actuator connector - Having problems with the throttle position actuator connector? Observing a decline in the performance of the engine day by day? Repair or replace your faulty throttle position actuator connector now. Don’t you worry, Parts Avatar has it all. Tune in now!
5. Powertrain control module - Poor engine performance, unexplained drops in the fuel economy and also problems in shifting the gears when in transmission are some common issues that follow a malfunction in the powertrain control module. Tune into Parts Avatar if you want to get rid of these problems caused by the error code P2126.
6. Throttle position sensor connector - Short circuited and disconnected throttle position sensor connectors can often be problematic. So to add some spark to your ride you definitely need the perfect quality throttle position sensor connector offered at Parts Avatar. Isn’t that just the perfect deal?
7. Pedal position sensor - Stressed? Tired of spending all of your hard earned money on various repairs? We know who the culprit is, it should be noted that whensoever the pedal position sensor is not functioning correctly, it will also lead to problems with fuel efficiency. The pedal position sensor other than monitoring and applying throttle pressure to the throttle body, also helps stabilize throttle control. So we advise you to get your pedal position sensor change or replaced right away to avoid major expensive repairs in future. Tune into Parts Avatar now!

Want to know the symptoms to OBD code P2126? If yes, then you have arrived at just the right place. We at Parts Avatar have listed out few common symptoms associated with throttle position sensor E circuit range/performance.

Common Symptoms

• An illuminated check engine light
• No acceleration at all
• A deteriorating acceleration
• At times, the car may lack engine power
• Black smoke emitting when the car is started
• No start condition
• Increased chances of a misfire
• An engine stall

Have a look at some ways with which you can correct the P2126 code:

• Replace or repair the damaged APP sensor
• Mend or restore the APP sensor wiring harness that is either open or short circuited
• Repair or replace APP sensor wiring that is jammed or damaged
• A weak electrical connection in the APP sensor circuitry should be repaired or replaced
• Restore or repair the APP sensor connector that is burnt or has bent pins
• Replacements or repairs should be performed of a defective throttle actuator control motor
• A malfunctioning TP actuator should be changed or repaired
• Replace or repair a faulty TP sensor
• The throttle actuator motor wiring or connectors if open, shorted or corroded should be repaired or replaced
• Replacing the PCM or reprogramming it

There is no need to get strained if your OBD code is still flashing up as we are here at your service. Have a look at our superior variety of accelerator pedal position assembly, throttle control motor, throttle position sensor, powertrain control module, APP sensor, TP actuator, TP sensor, throttle position sensor connector, pedal position sensor and many more. Now all your problems would vanish within no time.

Here are some steps which you should follow in order to diagnose this P2126 fault code:

Using a scan tool, it is advised to check for the idle and WOT (wide open throttle) readings for the TPS. it should be checked if they fall within the specifications. If they fail to match, then it should be repaired or replaced. This should be performed again after the necessary changes have been made

One should check for intermittent open or short in the TPS signal. Also, it should be noted that to do this a scan tool should not be used. Reason being that scan tools tend to take testings of many different readings in just over one or two data lines and often have a chance of missing an intermittent drop out. An oscilloscope should be employed to watch out for signals. It should swing up and down smoothly with no drops or spikes at all

If you encounter no problems, next, you should perform a shake test. The harness and the connector should be shaken (also take a note of carefully observing the pattern while you are shaking it). If it drops, replace or repair the TPS

If you fail to find any TPS signal, we advise you to check for 5 volt reference at the connector. If present, the ground circuit should be checked for open or short circuits.

Also, ensure that the circuit isn’t 12V (as it is not supposed to have battery voltage). And if it does have, the circuit should be traced for any signs of short circuit. Replacements should be made if required

Also, one should check for any signs of water in the connector. Replace the TPS if required

Common mistakes when diagnosing the P2126 code

Here we have listed a few common mistakes that should be avoided while diagnosing the error code:

• Performing a replacement of the APP sensor when the throttle body assembly should have been restored
• A failed inspection of the wiring and connectors before changing the APP sensor and/or the throttle body assembly