What does code P259F mean?

Q: What does code P259F mean?

Turbocharger A Boost Control Position At High Limit. P259F indicates that the engine control module has detected the turbocharger's variable-geometry boost control mechanism has reached its maximum commanded position but the expected boost pressure or vane position feedback does not match the command. The computer sets this code when the boost control actuator's position sensor reports a high limit condition, meaning the vanes are stuck at or beyond their normal travel range.

DTC codes / P25xx · Vehicle speed, idle control and auxiliary inputs / P259F

P259FTurbocharger A Boost Control Position At High Limit

P259F indicates that the engine control module has detected the turbocharger's variable-geometry boost control mechanism has reached its maximum commanded position but the expected boost pressure or vane position feedback does not match the command. The computer sets this code when the boost control actuator's position sensor reports a high limit condition, meaning the vanes are stuck at or beyond their normal travel range.

SystemPowertrain

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyProfessional

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.