7 Possible Symptoms Of Bad Accelerator Pedal Position Sensor


A faulty accelerator pedal position sensor can cause poor automatic transmission shifting or jerking when pressing the throttle pedal. It can result in delayed or inconsistent signals, leading to poor gear shifting.

Use an OBD2 Scan Tool to check for sensor-related DTCs. Inspecting the wire and connectors for looseness or damage. Test the sensor’s electrical signals using a multimeter or oscilloscope.

To reset the throttle position sensor, disconnect the negative battery cable for up to five minutes or remove the engine control module fuse.

The symptoms Of a bad accelerator pedal sensor include a rough idle, Issues with Acceleration, Shifting Issues, Fuel Consumption, etc.

Driving with a bad accelerator pedal position sensor can damage the engine, so replace it as soon as possible. That is why you need to know about the symptoms of a bad accelerator pedal position sensor.

Now, let’s dive deep to explain the 7 possible symptoms of a bad accelerator pedal position sensor!


The car doesn’t Move When The Pedal Is Pressed

It is simple to identify this symptom. Every owner eventually learns how to manipulate the gas pedal in their vehicle. Your accelerator pedal sensor may be faulty if you sense difficulty accelerating in your vehicle.

Since a faulty pedal signal might be fatal, it is recommended to pull over and contact a mechanic right away in this situation.

Rough Idle

A car engine should run at between 600 and 700 revolutions per minute. The engine idles smoothly, without shaking, and uses less fuel at these RPMs.

If there are no issues with the fuel mixture and your automobile is not idling smoothly, an issue with the accelerator pedal sensor may be the cause.

Issues with Acceleration

Your accelerator pedal sensor is not able to send out positioning signals accurately if your car can only accelerate to a specific point and won’t go any faster. This prevents your car from going faster when you push the gas pedal.

Related: Symptoms of A Bad Idle Air Control Valve

Symptoms Of Bad Accelerator Pedal Position Sensor

Shifting Issues

The car’s automatic transmission computer will receive inaccurate signals if the accelerator pedal sensor isn’t functioning properly.

Sometimes depressing the pedal will result in delayed signals or a burst of different signals, which the computer in your automobile tries to gather and utilize to modify the combination of signals.

Fuel Consumption

A drop or rise in fuel efficiency is a common symptom of a faulty accelerator pedal position sensor. The engine may receive too much or too little fuel as a result of an incorrect signal being sent to the engine control module by a failed pedal position sensor. Fuel consumption will be poorer (or better) as a result.

Check Engine Light

A monitoring system that covers every sensor in the car engine is a feature of modern automobiles. The engine control unit will activate the check engine light if it believes that one of these sensors is faulty and is sending out the incorrect signal. Using a car scan tool, you should check the trouble codes if your check engine light is on.


That is all for this article, where the top possible symptoms of a bad accelerator pedal position sensor are discussed. I hope it was helpful, if so, kindly share with others. Thanks for reading, see you around!


3 responses to “7 Possible Symptoms Of Bad Accelerator Pedal Position Sensor”

  1. Van Diesel Avatar
    Van Diesel

    I believe that the APP sensors detect and relay the position and movement of the accelerator pedal, while the TPS monitors the position of the throttle plate within the intake manifold. Sensor Placement: APP sensors are typically located near the accelerator pedal assembly, while TPS is usually positioned near the throttle body. Thanks!

  2. In my understanding, the P0122 code is the generic OBD-II code defined as “Throttle Pedal Position Sensor/Switch (TPS) A Circuit Low Input.” This code relates to the vehicle’s engine control module (ECM) and TPS sensor circuit. An output voltage is triggered when the voltage falls below the sensor’s anticipated range. I appreciate it!

  3. In my opinion, driving around with a bad accelerator pedal position sensor can damage your engine, so you’ll want to replace it as soon as possible. Am grateful!

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