P2122 – Audi DTC

Audi DTC P2122 – Accelerator Pedal Position (APP) assembly failure, Powertrain Control Module (PCM) failure, Throttle control motor failure, Wiring issue

DTC P2122 meaning on Audi

DTC P2122 refers to a problem with the Accelerator Pedal Position (APP) sensor in Audi vehicles. This code indicates that the Powertrain Control Module (PCM) has detected a low voltage signal from the APP sensor, which is responsible for relaying the position of the accelerator pedal to the engine control unit. A malfunction in this system can lead to poor engine performance and reduced throttle response.

Audi DTC P2122 symptoms

Common symptoms associated with DTC P2122 may include:

• Illumination of the check engine light
• Unresponsive or delayed throttle response
• Engine stalling or hesitation during acceleration
• Reduced engine power or limp mode activation
• Erratic engine behavior

Audi DTC P2122 causes

The causes of DTC P2122 can include:

• Failure of the Accelerator Pedal Position (APP) assembly
• Malfunction of the Powertrain Control Module (PCM)
• Throttle control motor failure
• Wiring issues, such as damaged or corroded connectors

Audi DTC P2122 seriousness

DTC P2122 is considered a serious issue as it directly affects the vehicle’s throttle response and overall engine performance. If left unaddressed, it can lead to dangerous driving conditions, including sudden loss of power or stalling. It is crucial to diagnose and repair this issue promptly to ensure safe vehicle operation.

How to diagnose DTC P2122 on Audi

To diagnose DTC P2122, follow these steps:

1. Use an OBD-II scanner to confirm the presence of DTC P2122.
2. Inspect the accelerator pedal position sensor and its wiring for any visible damage or corrosion.
3. Check the voltage output of the APP sensor using a multimeter.
4. Test the Powertrain Control Module (PCM) for any faults or software issues.
5. Examine the throttle control motor for proper operation.

How to fix DTC P2122 on Audi step-by-step instructions

To fix DTC P2122, follow these step-by-step instructions:

1. Disconnect the battery to ensure safety while working on the electrical components.
2. Inspect and repair any damaged wiring or connectors related to the APP sensor.
3. Replace the Accelerator Pedal Position (APP) assembly if it is found to be faulty.
4. Check and replace the throttle control motor if necessary.
5. Reprogram or replace the Powertrain Control Module (PCM) if it is determined to be defective.
6. Reconnect the battery and clear the DTC using an OBD-II scanner.
7. Test drive the vehicle to ensure the issue is resolved and the check engine light does not reappear.

How to erase DTC P2122 on Audi

To erase DTC P2122, follow these steps:

1. Connect an OBD-II scanner to the vehicle’s diagnostic port.
2. Turn on the ignition without starting the engine.
3. Navigate to the DTC menu on the scanner and select the option to clear or erase codes.
4. Confirm the action and wait for the scanner to complete the process.
5. Disconnect the scanner and start the engine to verify that the check engine light is off.

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