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 wording
Source wording can vary by vehicle and suffix. It is shown as written, not as a universal diagnosis.
P206B31Malfunction of the concentration sensor for AdBlue
P206B31Malfunction of the concentration sensor for AdBlue
P206B31Malfunction of the concentration sensor for AdBlue
Manufacturer communications
20Original wording in English
DODGE, FREIGHTLINER, MERCEDES-BENZ
The check engine light is illuminated, or the AdBlue warning is active, with recorded faults related to AdBlue quality or concentration. Complaint Customer reports an illuminated check engine light and or an AdBlue system warning indicating AdBlue quality out of specification. The vehicle may enter reduced performance mode. One …
FREIGHTLINER, MERCEDES-BENZ
Check engine light or Adblue warning with fault codes P206B31, P203B31, or P300494 present in AdBlue (SCR) control unit (N118/5) Complaint The check engine light or AdBlue warning is activated, accompanied by one or more of the following fault codes related to the AdBlue tank: P206B31 Malfunction of the concentration sensor for …
FREIGHTLINER, MERCEDES-BENZ
Vehicles with SCR Generation 4: SCR/AdBlue® warning message cannot be reset with fault code P13DF00 or P300685 Complaint SCR or AdBlue warning message cannot be reset. All fault codes in the AdBlue (SCR) control unit have been processed and corrected, however fault codes P13DF00 or P300685 remain active and stored. Cause The pro…
FREIGHTLINER, MERCEDES-BENZ
Check engine light or Adblue warning with fault codes P206B31, P203B31, or P300494 present in AdBlue (SCR) control unit (N118/5) Complaint The check engine light or AdBlue warning is activated, accompanied by one or more of the following fault codes related to the AdBlue tank: P206B31: Malfunction of the concentration sensor for…
Check vehicle applicability
202A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
| Make | Model | Model year |
|---|---|---|
| Chevrolet | CRUZE ↗ | 2018 |
| Chevrolet | EQUINOX ↗ | 2018 |
| Chevrolet | SILVERADO 1500 ↗ | 2018 |
| Chevrolet | SILVERADO 2500 ↗ | 2018 |
| Chevrolet | SILVERADO 3500 ↗ | 2018 |
| Dodge | SPRINTER 2500 ↗ | 2014 |
| Dodge | SPRINTER 2500 ↗ | 2013 |
| Dodge | SPRINTER 2500 ↗ | 2012 |
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.