The P2120 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, with a repair time of 1.0.

To fix the issue, one must visually inspect the wiring harness and connectors, check for damaged components, and look for broken, bent, pushed out, or corroded connector pins.

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 p2120 fault code.

Here are the symptoms to look out for:

  • The P2120 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 P2120 can be caused by a range of issues, including a faulty APP sensor and poor electrical connections.

  • The automobile fault code P2120 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 the P2120 fault code.

Below are some possible fixes for the automobile fault code p2120, including inspecting wiring harness and connectors for damage or corrosion.

  • To fix the automobile fault code p2120, you need to 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 fix will take an estimated repair time of 1.0 hour.

The automobile fault code P2120 can be diagnosed and fixed in an estimated repair time of 1.0 hour.

The cost of repair is influenced by the repair time, which is commonly charged between $75 and $150 per hour by most auto repair shops.

Therefore, the total cost of fixing the P2120 fault code will depend on the hourly rate charged by the repair shop and the estimated repair time required to fix the issue.

The P2120 code refers to a problem with the ThrottlePedal Position SensorSwitch ‘D’ Circuit.

The Accelerator Pedal Position (APP) sensor is an input to the Powertrain Control Module (PCM) and used to determine the amount of torque requested by the operator. There are 2 pedal position signals in the sensor, APP and APP2, which have a positive slope but are offset and 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 pedal position signal is converted to pedal travel degrees by the PCM, which is the input to the torque based strategy.

What are the possible causes of the P2120 fault code?

If your engine light is on and you’re seeing the P2120 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 P2120 fault code?

If you’re experiencing an Engine Light ON or Service Engine Soon Warning Light due to a P2120 fault code, you may have a faulty Accelerator Pedal Position (APP) Sensor or a poor electrical connection. To fix this issue, visually inspect the related wiring harness and connectors for any damage or broken, bent, pushed out, or corroded pins. Check for any damaged components and ensure that the Accelerator Pedal Position (APP) Sensor circuit is not open or shorted.

What are the steps to take if I find damaged components or broken connector pins when checking the P2120 fault code?

If you find damaged components or broken connector pins when checking the P2120 fault code, start by visually inspecting the related wiring harness and connectors. Check for any broken, bent, pushed out, or corroded connector pins. This could be the cause of the faulty Accelerator Pedal Position (APP) Sensor or poor electrical connection. If you find any damaged components or broken connector pins, replace or repair them accordingly.

p2120 error fault code explained

If your engine light is on and you have a P2120 code, check the accelerator pedal position sensor and its wiring harness for faults. Inspect the wiring and connectors for damage, and check for broken or corroded pins. Also, check the powertrain control module for faults.

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