What does code P25B3 mean?

Q: What does code P25B3 mean?

Turbocharger/Supercharger Wastegate A Stuck Open. P25B3 indicates the engine control module has detected that the turbocharger or supercharger wastegate valve is stuck in the open position, preventing the system from building the commanded boost pressure. The computer typically compares actual boost pressure or wastegate actuator position against the desired value and sets this code when the deviation exceeds a calibrated threshold for a set time.

DTC codes / P25xx · Vehicle speed, idle control and auxiliary inputs / P25B3

P25B3Turbocharger/Supercharger Wastegate A Stuck Open

P25B3 indicates the engine control module has detected that the turbocharger or supercharger wastegate valve is stuck in the open position, preventing the system from building the commanded boost pressure. The computer typically compares actual boost pressure or wastegate actuator position against the desired value and sets this code when the deviation exceeds a calibrated threshold for a set time.

SystemPowertrain

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyIntermediate

AreaVehicle speed, idle control and auxiliary inputs

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