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TuningBot DTC Database · v4.37.15

P1429 Diagnostic Trouble Code (4 interpretations)

4 manufacturer-specific interpretations across 3 manufacturers in the TuningBot DTC database.

P · PowertrainEngineOBD2
Brand pages:HondaPSAVAG

Honda

1 interpretation
P1429
Motor driver module - overheating signal circuit problem Honda · engine Data confidence 62%

The control module detected that the Motor driver module temperature exceeded its permissible limit. This is the manufacturer-specific definition used by Honda.

Possible causes

  • Wiring
  • motor control module (MCM)
  • voltage converter module

PSA

1 interpretation
P1429
Differential exhaust pressure signal : Reaction time too long PSA · emissions Data confidence 72%

The control module detected the fault condition "Reaction time too long" for the Differential exhaust pressure signal. Documented for the Siemens SID 803 injection ECU (DW10BTED4 2.0 HDi) on Peugeot applications; the same PSA control units are also fitted to Citroën models.

Applies to Peugeot Siemens SID 803 injection ECU (DW10BTED4 2.0 HDi)

VAG

2 interpretations
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 (4 interpretations). The control module detected that the Motor driver module temperature exceeded its permissible limit. This is the manufacturer-specific definition used by Honda.

Is P1429 generic or manufacturer-specific?

P1429 is a manufacturer-specific code. In this database it is documented for: Honda, PSA, 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

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