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.
Manufacturer communications
4Original wording in English
MERCEDES-BENZ
Reported code forms P203B31 P203B49
Complaint Indicator lamp illuminates in instrument cluster, fault codes P203B31, P203B49 and P206B31 present in AdBlue® (SCR) control unit (N118/5). Cause Software for AdBlue® (SCR) control unit (N118/5) Remedy Update…
MERCEDES-BENZ
Reported code forms P203B31 P203B49
Check engine light illuminates in instrument cluster, fault codes P203B31 or P203B49 or P206B31 present in AdBlue(R) (SCR) control unit
MERCEDES-BENZ
Reported code forms P203B31 P203B49
Check engine light on with fault codes P203B31, P203B49, P206B31, P13DF00 present in the SCR control unit
MERCEDES-BENZ
Reported code forms P203B00
Engine diagnosis indicator lamp lights up in instrument cluster and fault code P203B00 is stored in the AdBlue® (SCR) control unit
Check vehicle applicability
1A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
| Make | Model | Model year |
|---|---|---|
| Mercedes-Benz | MERCEDES-BENZ | Year 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.
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.