The P2129 fault code in automobiles refers to a problem with the Accelerator Pedal Position (APP) Sensor. The most common symptom is the Engine Light turning on. The cause of this issue could be a faulty APP sensor, an open or shorted APP sensor harness, a poor electrical connection in the APP sensor circuit, or a faulty Powertrain Control Module (PCM).

The importance of repairing this issue lies in the fact that it affects the vehicle’s acceleration and performance.

The repair difficulty is moderate, and the fix involves visually inspecting the wiring harness and connectors, checking for damaged components, and looking for broken, bent, pushed out, or corroded connector’s pins. The repair time is estimated to be around 1.0 hour. To interpret the fault code, one needs to use an OBD-II scanner or code reader.

Repair Importance Level10.0 (Out of 10)
Estimated Repair TimeApproximately 1.0 hour
Repair Difficulty Level6.67 (Out of 10)

If you notice the Engine Light ON or Service Engine Soon Warning Light, it could be a sign of p2129 fault code.

Here are the symptoms to look out for:

  • The P2129 fault code in an automobile can cause several symptoms, including the engine light turning on or the service engine soon warning light appearing.
  • Other symptoms may include a decrease in engine power, a decrease in fuel efficiency, and difficulty accelerating.
  • The vehicle may also experience stalling or hesitation during acceleration, and the throttle may not respond properly.
  • Additionally, the vehicle may experience rough idling or a lack of response when the accelerator pedal is pressed.

The automobile fault code P2129 can be caused by a faulty APP sensor, open or shorted APP sensor harness, poor electrical connection, or a faulty PCM.

  • The automobile fault code P2129 can be caused by a faulty Accelerator Pedal Position (APP) Sensor.
  • It can also be caused by an open or shorted Accelerator Pedal Position (APP) Sensor harness.
  • Another cause can be a poor electrical connection in the Accelerator Pedal Position (APP) Sensor circuit.
  • Lastly, a faulty Powertrain Control Module (PCM) can also cause this fault code.

To fix the p2129 fault code, check the possible causes and inspect the wiring harness and connectors for any damage or corrosion.

  • To fix the automobile fault code p2129, first, check the possible causes listed above.
  • Then, visually inspect the related wiring harness and connectors.
  • Look for any damaged components and check for broken, bent, pushed out, or corroded connector’s pins.
  • This fix will take an estimated repair time of 1.0 hour.

The automobile fault code P2129 can be diagnosed and fixed within an estimated repair time of 1.0 hour.

The cost of repair is influenced by the hourly rate charged by the auto repair shop, which typically ranges between $75 and $150 per hour.

Therefore, the total cost of diagnosing and fixing the P2129 fault code will depend on the hourly rate charged by the auto repair shop and the estimated repair time required to fix the issue.

The P2129 code is related to the Accelerator Pedal Position (APP) sensor.

The sensor has two pedal position signals, APP and APP2, which have a positive slope but increase at different rates.

The PCM determines if a signal is incorrect by calculating where it should be, inferred from the other signals. If a concern is present with one of the circuits, the other input is used.

The code indicates an intermittent issue with the ThrottlePedal Position SensorSwitch ‘E’ Circuit.

What are the possible causes of the P2129 fault code?

If your engine light is on and you’re seeing the P2129 fault code, it could be due to a faulty Accelerator Pedal Position (APP) Sensor, an open or shorted APP Sensor harness, a poor electrical connection in the APP Sensor circuit, or a faulty Powertrain Control Module (PCM). To fix the issue, check the possible causes listed above, visually inspect the related wiring harness and connectors, and look for any damaged components or broken, bent, pushed out, or corroded connector pins.

How can I visually inspect the wiring harness and connectors related to the P2129 fault code?

If you’re experiencing an Engine Light ON (or Service Engine Soon Warning Light) due to the P2129 fault code, you may need to visually inspect the wiring harness and connectors related to the issue. Check for damaged components and look for broken, bent, pushed out, or corroded connector’s pins. This could be caused by a faulty Accelerator Pedal Position (APP) Sensor, an open or shorted APP Sensor harness, a poor electrical connection in the APP Sensor circuit, or a faulty Powertrain Control Module (PCM).

What are the steps to take if I find damaged components or broken, bent, pushed out, or corroded connector’s pins related to the P2129 fault code?

If you find damaged components or broken, bent, pushed out, or corroded connector’s pins related to the P2129 fault code, follow these steps: Check the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Look for damaged components and check for broken, bent, pushed out, or corroded connector’s pins. This will help you identify the cause of the problem and take the necessary steps to fix it.

p2129 error fault code explained

If you see the Engine Light ON or Service Engine Soon Warning Light, it could be due to a faulty Accelerator Pedal Position (APP) Sensor, APP Sensor harness being open or shorted, APP Sensor circuit poor electrical connection, or a faulty Powertrain Control Module (PCM). Check the possible causes, visually inspect the related wiring harness and connectors, and look for damaged components and connector’s pins.

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