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TuningBot DTC Database · v4.37.15

P1178 VAG - Diagnostic Trouble Code (2 interpretations)

Manufacturer-specific interpretation for VAG. All interpretations of P1178

P · PowertrainEmissionsOBD2

What P1178 means

P1178
Heated oxygen sensor (HO2S) 1, Bank 1, pump current - open circuit VAG · emissions Data confidence 62%

The control module detected an interruption (open circuit) in the Heated oxygen sensor (HO2S) 1, Bank 1, pump current circuit, so the expected electrical continuity was not present. This is the manufacturer-specific definition used by Audi.

Possible causes

  • Wiring open circuit
  • HO2S
Applies to Audi
P1178
Heated oxygen sensor (HO2S) pump current - open circuit VAG · emissions Data confidence 80%

The control module detected an interruption (open circuit) in the Heated oxygen sensor (HO2S) pump current circuit, so the expected electrical continuity was not present. This is the manufacturer-specific definition used by Volkswagen.

Possible causes

  • Wiring open circuit
  • HO2S
Applies to Volkswagen

Related and nearby codes

How to read P1178

P

Powertrain: engine, transmission and driveline systems.

1

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

178

Specific fault index within the subsystem.

Frequently asked questions about P1178

What does P1178 mean?

Diagnostic Trouble Code (2 interpretations). The control module detected an interruption (open circuit) in the Heated oxygen sensor (HO2S) 1, Bank 1, pump current circuit, so the expected electrical continuity was not present. This is the manufacturer-specific definition used by Audi.

Is P1178 generic or manufacturer-specific?

P1178 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 P1178 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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