What does code P208B mean?

Q: What does code P208B mean?

Reductant Pump A Control Performance/Stuck Off. P208B indicates that the engine control module has commanded the reductant pump to run but has not detected the expected pressure or current feedback, so it flags the pump circuit as stuck off. The module monitors the pump's electrical load and the resulting pressure in the diesel exhaust fluid system, and when either stays flat during a commanded prime or dosing event, this code sets.

DTC codes / P20xx · Fuel and air metering and auxiliary emission controls / P208B

P208BReductant Pump A Control Performance/Stuck Off

P208B indicates that the engine control module has commanded the reductant pump to run but has not detected the expected pressure or current feedback, so it flags the pump circuit as stuck off. The module monitors the pump's electrical load and the resulting pressure in the diesel exhaust fluid system, and when either stays flat during a commanded prime or dosing event, this code sets.

SystemPowertrain

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyIntermediate

AreaFuel and air metering and auxiliary emission controls

Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.