DTC codes / P25xx · Vehicle speed, idle control and auxiliary inputs / P2599
P2599 means the engine computer has detected that the turbocharger boost control position sensor on circuit A is reporting a stuck-high signal, meaning the sensor voltage remains above the expected range for the current operating conditions. The computer compares the commanded boost control position with the actual sensor feedback and flags the fault when the signal fails to move or stays pegged high.
Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.
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