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TuningBot DTC Database · v4.37.15

P1546 VAG - Diagnostic Trouble Code (2 interpretations)

Manufacturer-specific interpretation for VAG. All interpretations of P1546

P · PowertrainEngineOBD2

What P1546 means

P1546
Turbocharger (TC) wastegate regulating valve - short to positive VAG · engine Data confidence 62%

The control module detected a short circuit to battery voltage in the Turbocharger (TC) wastegate regulating valve circuit. This is the manufacturer-specific definition used by Audi.

Possible causes

  • Wiring short to positive
  • TC wastegate regulating valve
Applies to Audi
P1546
Boost Pressure Controle Valve (N75): Short to B+ VAG · engine Data confidence 84%

The control module detected a short circuit to battery voltage in the Boost Pressure Controle Valve (N75) circuit. This is the manufacturer-specific definition used by Volkswagen. Volkswagen Group tools also report it as fault code 17954. Documented across Volkswagen Group applications (Audi, SEAT and Škoda included).

Symptoms

  • Irregular behaviour
  • Loss of power
  • Limp mode

Possible causes

  • Wiring and/or connections faulty (short circuit)
  • N75 faulty

Recommended checks

  • Check wiring and connections
  • Check / Replace N75
Applies to Volkswagen

Related and nearby codes

How to read P1546

P

Powertrain: engine, transmission and driveline systems.

1

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

546

Specific fault index within the subsystem.

Frequently asked questions about P1546

What does P1546 mean?

Diagnostic Trouble Code (2 interpretations). The control module detected a short circuit to battery voltage in the Turbocharger (TC) wastegate regulating valve circuit. This is the manufacturer-specific definition used by Audi.

Is P1546 generic or manufacturer-specific?

P1546 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 P1546 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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