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TuningBot DTC Database · v4.37.15

P1429 VAG - Diagnostic Trouble Code (2 interpretations)

Manufacturer-specific interpretation for VAG. All interpretations of P1429

P · PowertrainEngineOBD2

What P1429 means

P1429
Vacuum pump, brakes - open circuit VAG · engine Data confidence 62%

The control module detected an interruption (open circuit) in the Vacuum pump, brakes circuit, so the expected electrical continuity was not present. This is the manufacturer-specific definition used by Audi.

Possible causes

  • Wiring open circuit
  • vacuum pump
Applies to Audi
P1429
Circuit for Brake Vacuum Pump: Open Circuit VAG · engine Data confidence 84%

The control module detected an interruption (open circuit) in the Circuit for Brake Vacuum Pump circuit, so the expected electrical continuity was not present. This is the manufacturer-specific definition used by Volkswagen. Volkswagen Group tools also report it as fault code 17837. Documented across Volkswagen Group applications (Audi, SEAT and Škoda included).

Symptoms

Malfunction Indicator Light (MIL) ON

Possible causes

  • Wiring harness issue
  • Faulty Brake Booster Control Module (J542)

Recommended checks

  • Check fuses
  • Test wiring harness, see repair manual
Applies to Volkswagen

Related and nearby codes

How to read P1429

P

Powertrain: engine, transmission and driveline systems.

1

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

429

Specific fault index within the subsystem.

Frequently asked questions about P1429

What does P1429 mean?

Diagnostic Trouble Code (2 interpretations). The control module detected an interruption (open circuit) in the Vacuum pump, brakes circuit, so the expected electrical continuity was not present. This is the manufacturer-specific definition used by Audi.

Is P1429 generic or manufacturer-specific?

P1429 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 P1429 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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