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TuningBot DTC Database · v4.37.15

P1631 VAG - Diagnostic Trouble Code (2 interpretations)

Manufacturer-specific interpretation for VAG. All interpretations of P1631

P · PowertrainEngineOBD2

What P1631 means

P1631
Accelerator pedal position (APP) sensor 1 - high input VAG · engine Data confidence 62%

The control module detected that the Accelerator pedal position (APP) sensor 1 signal stayed above the expected range. This is the manufacturer-specific definition used by Audi.

Possible causes

  • Wiring short to positive
  • APP sensor
Applies to Audi
P1631
Accelerator Position Sensor (G79): Signal too High VAG · engine Data confidence 84%

The control module detected that the Accelerator Position Sensor (G79) value was above the expected limit. This is the manufacturer-specific definition used by Volkswagen. Volkswagen Group tools also report it as fault code 18039. Documented across Volkswagen Group applications (Audi, SEAT and Škoda included).

Symptoms

  • Malfunction Indicator Light (MIL) ON
  • Reduced Engine Output

Possible causes

  • Wiring and/or connections faulty
  • Faulty ECM
  • Faulty Accelerator Pedal

Recommended checks

  • Check Measuring Block Readings for Accelerator Pedal
  • Check Voltage Signals from ECM to Throttle Pedal (see factory repair manual)
  • Check Wiring and Connectors from ECM to Accelerator Pedal
Applies to Volkswagen

Related and nearby codes

How to read P1631

P

Powertrain: engine, transmission and driveline systems.

1

Manufacturer-defined range: the meaning can differ between brands.

631

Specific fault index within the subsystem.

Frequently asked questions about P1631

What does P1631 mean?

Diagnostic Trouble Code (2 interpretations). The control module detected that the Accelerator pedal position (APP) sensor 1 signal stayed above the expected range. This is the manufacturer-specific definition used by Audi.

Is P1631 generic or manufacturer-specific?

P1631 is a manufacturer-specific code. In this database it is documented for: VAG. The same number can mean something different on other brands.

Can TuningBot remove P1631 at file level?

If the fault logic lives in the ECU calibration, yes: our DTC Removal file service disables the specific fault entry. Checksum correction is not included: it is a separate, optional service. Not sure whether your case qualifies? Request a free assessment and our engineers will check your ECU file.

Other file services

ECU tuningStage 1 dyno results for VAG engines See the results →

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