DTC codes / P25xx · Vehicle speed, idle control and auxiliary inputs / P2589
P2589 is a generic powertrain code indicating that the engine control module has detected an abnormally high voltage on the signal circuit for the turbocharger boost control position sensor B. The sensor reports the physical position of the variable geometry turbocharger vanes or wastegate actuator, and a high voltage reading typically means the signal wire is shorted to power, the sensor ground is open, or the sensor itself has failed.
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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