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U156C

Code meaning and manufacturer information

OBD-II / DTC

Reference meaning

What does this code mean?

The wording below belongs to the named make and communication. Match the complete code, reporting module, model year and engine before applying it.

A code identifies a detected condition, not a part that must automatically be replaced.

Narrow by vehicle

A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.

Before replacing a part

Record codes and freeze-frame data. Check battery condition, related codes and visible wiring or hose damage. Follow the vehicle's diagnostic procedure and test results before replacing parts.

Scan worksheet →

Manufacturer communications

1

Original wording in English

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AUDI

This bulletin states to ignore DTCs U156C00, B1A06F1, B1A06F2 and to not perform any repairs or run any test plans for these ghost DTCs.

Check vehicle applicability

46

A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.

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MakeModelModel year
AudiA4 ↗2022
AudiA4 ↗2021
AudiA4 ↗2020
AudiA5 ↗2022
AudiA5 ↗2021
AudiA5 ↗2020
AudiA5 CABRIOLET ↗2021
AudiA5 CABRIOLET ↗2020

Can I keep driving?

A code alone cannot establish whether driving is safe. A flashing malfunction light, severe shaking, overheating, oil-pressure warning or loss of braking or steering needs prompt attention. Stop in a safe place and seek assistance when control or engine safety is affected. Follow the vehicle handbook.