P2135 – Audi DTC

Audi DTC P2135 – Accelerator Pedal Position (APP) assembly failure, Powertrain Control Module (PCM) failure, Throttle Position Sensor (TPS) failure, Wiring issue

DTC P2135 meaning on Audi

DTC P2135 refers to a fault in the Accelerator Pedal Position (APP) sensor circuit. This code indicates that the Powertrain Control Module (PCM) has detected a discrepancy between the signals from the APP sensor and the Throttle Position Sensor (TPS). The APP sensor is crucial for determining the driver’s intent regarding acceleration, and any failure in this system can lead to performance issues.

Audi DTC P2135 symptoms

Common symptoms associated with DTC P2135 may include:

• Illumination of the check engine light
• Unresponsive or erratic throttle response
• Reduced engine power or limp mode activation
• Stalling or difficulty starting the engine
• Increased fuel consumption

Audi DTC P2135 causes

Several factors can lead to the occurrence of DTC P2135, including:

• Failure of the Accelerator Pedal Position (APP) assembly
• Malfunction of the Powertrain Control Module (PCM)
• Faulty Throttle Position Sensor (TPS)
• Wiring issues such as shorts, opens, or corrosion in the APP or TPS circuits

Audi DTC P2135 seriousness

DTC P2135 is considered a serious issue as it directly affects the vehicle’s throttle control. If left unaddressed, it can lead to:

• Loss of engine power
• Increased risk of accidents due to unresponsive throttle
• Potential damage to the engine or transmission

How to diagnose DTC P2135 on Audi

To diagnose DTC P2135, follow these steps:

1. Use an OBD-II scanner to confirm the presence of DTC P2135.
2. Inspect the wiring and connectors related to the APP and TPS for any visible damage.
3. Check the APP sensor voltage and resistance using a multimeter.
4. Test the TPS for proper operation and signal output.
5. Examine the PCM for any software updates or faults.
6. Clear the DTC and perform a road test to see if the code reappears.

How to fix DTC P2135 on Audi step-by-step instructions

To fix DTC P2135, follow these steps:

1. Inspect and repair any damaged wiring or connectors related to the APP and TPS.
2. Replace the Accelerator Pedal Position (APP) assembly if it is faulty.
3. Replace the Throttle Position Sensor (TPS) if it is malfunctioning.
4. Reprogram or replace the Powertrain Control Module (PCM) if necessary.
5. Clear the DTC using an OBD-II scanner.
6. Test drive the vehicle to ensure the issue is resolved and the code does not return.

How to erase DTC P2135 on Audi

To erase DTC P2135, 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. Access the diagnostic menu on the scanner and select the option to clear or erase DTCs.
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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