HomeU0121 · Code meaning and manufacturer information
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U0121

Code meaning and manufacturer information

U0121

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.

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

Manufacturer wording

Source wording can vary by vehicle and suffix. It is shown as written, not as a universal diagnosis.

Manufacturer communications

1

Original wording in English

KC-2119

VOLVO

Reported code forms U012100

DTC U012100 - Lost Communication With Anti-Lock Brake System (ABS) Control Module, No Additional Information

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Check vehicle applicability

1

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

Historical vehicle association; OBD-II compatibility is not established by this record.

MakeModelModel year
VolvoD7CYear not specified

Historical records · 243 · Historical vehicle association; OBD-II compatibility is not established by this record.

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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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.