DTC codes / P25xx · Vehicle speed, idle control and auxiliary inputs / P2586
P2586 indicates that the powertrain control module has detected an implausible signal from the turbocharger boost control position sensor B circuit, which monitors the vane or wastegate actuator position on the turbocharger. The computer compares the sensor B voltage or position feedback against expected values and sets the code when the signal falls outside the acceptable range or disagrees with the commanded boost level.
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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