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U1121

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.

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Manufacturer communications

36

Original wording in English

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AUDI

This bulletin provides information when DTC P00000 / U112100 is stored in diagnostic address 0009.

AUDI

This bulletin provides information when DTC P00000 / U112100 is stored in diagnostic address 0009.

AUDI

This bulletin provides information when the arning lamp for exterior lighting is displayed in the instrument cluster; DTC U112100, U110B00, B126A29.

AUDI

This bulletin provides information when a warning lamp for exterior lighting is displayed in the instrument cluster; DTC U112100, U110B00, B126A29.

Check vehicle applicability

217

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
AudiA3 ↗2024
AudiA3 ↗2023
AudiA3 ↗2022
AudiA5 ↗2026
AudiA5 ↗2025
AudiA6 ↗2026
AudiA6 ↗2025
AudiA6 ↗2024

Code meaning and manufacturer information

Original wording in English · Historical directory labels; manufacturer applicability has not been established for every entry.

SCP (J1850) Invalid or Missing Data for Primary Id

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.