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U0402

Code meaning and manufacturer information

U0402

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 communications

1

Original wording in English

LI07-08P056245

MERCEDES-BENZ

Reported code forms U040208

XENTRY (MERCEDES): DATA ENTRY ERROR IN SOFTWARE OF GASOLINE ENGINE CONTROL UNIT RESULTED IN FAULT CODE U040208 IS LOGGED IN FAULT MEMORY OF GASOLINE ENGINE CONTROL UNIT. SOFTWARE NEEDS UPDATED DATA VERSION OF GASOLINE…

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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.

MakeModelModel year
Mercedes-BenzMERCEDES BENZYear not specified

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.