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P1791 – Audi DTC

Audi DTC P1791 – Transmission Range Display Circuit Short to Ground

DTC P1791 meaning on Audi

DTC P1791 in an Audi indicates a Transmission Range Display Circuit Short to Ground. This fault code is triggered when the Engine Control Module (ECM) detects a short circuit to ground in the transmission range display circuit.

Audi DTC P1791 symptoms

Symptoms of DTC P1791 in an Audi may include:

  • Check Engine Light illuminated
  • Transmission shifting issues
  • Inaccurate gear display on the instrument cluster

Audi DTC P1791 causes

The common causes of DTC P1791 in an Audi are:

  • Short circuit to ground in the transmission range display circuit
  • Wiring harness issues
  • Faulty transmission range sensor

Audi DTC P1791 seriousness

DTC P1791 should be addressed promptly as it can lead to transmission-related problems and inaccurate gear display, affecting the drivability and safety of the vehicle.

How to diagnose DTC P1791 on Audi

To diagnose DTC P1791 on an Audi, follow these steps:

  1. Use a diagnostic scanner to retrieve the fault code and freeze frame data
  2. Inspect the wiring harness for any visible damage or shorts
  3. Check the transmission range sensor for proper operation
  4. Perform a continuity test on the transmission range display circuit

How to fix DTC P1791 on Audi

To fix DTC P1791 on an Audi, you can:

  1. Repair any damaged wiring or replace the wiring harness if necessary
  2. Replace the faulty transmission range sensor
  3. Clear the fault code and test drive the vehicle to ensure the issue is resolved

How to erase DTC P1791 on Audi

To erase DTC P1791 on an Audi:

  1. Use a diagnostic scanner to clear the fault code
  2. Perform a final check to ensure the code has been successfully erased

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