What does code P25A7 mean?

Q: What does code P25A7 mean?

Fuel Mode Select Switch Circuit High. P25A7 indicates that the powertrain control module (PCM) has detected an abnormally high voltage on the fuel mode select switch circuit, which is used to tell the computer which fuel map or mode the driver has selected. The PCM expects a voltage within a specific range, and a high reading typically means the circuit is open, shorted to voltage, or the switch is not providing the expected ground reference.

DTC codes / P25xx · Vehicle speed, idle control and auxiliary inputs / P25A7

P25A7Fuel Mode Select Switch Circuit High

P25A7 indicates that the powertrain control module (PCM) has detected an abnormally high voltage on the fuel mode select switch circuit, which is used to tell the computer which fuel map or mode the driver has selected. The PCM expects a voltage within a specific range, and a high reading typically means the circuit is open, shorted to voltage, or the switch is not providing the expected ground reference.

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.