What does code P257E mean?

Q: What does code P257E mean?

Engine Hood Switch Circuit Low. P257E means the engine control module (ECM) has detected a low-voltage condition on the engine hood switch circuit, indicating the hood is either open or the circuit is shorted to ground. The ECM uses this switch to know whether the hood is closed, which affects remote start, alarm arming, and some underhood diagnostic routines.

DTC codes / P25xx · Vehicle speed, idle control and auxiliary inputs / P257E

P257EEngine Hood Switch Circuit Low

P257E means the engine control module (ECM) has detected a low-voltage condition on the engine hood switch circuit, indicating the hood is either open or the circuit is shorted to ground. The ECM uses this switch to know whether the hood is closed, which affects remote start, alarm arming, and some underhood diagnostic routines.

SystemPowertrain

Code typeGeneric (all makes)

SeverityLow

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.