What does code P257F mean?

Q: What does code P257F mean?

Engine Hood Switch Circuit High. P257F means the engine control module (ECM) sees the hood switch circuit voltage higher than expected, indicating an open circuit, a faulty switch, or a wiring problem. The ECM uses this switch to know whether the hood is open, primarily for security and remote-start logic, and it sets the code when the signal stays above the normal threshold for a calibrated time.

DTC codes / P25xx · Vehicle speed, idle control and auxiliary inputs / P257F

P257FEngine Hood Switch Circuit High

P257F means the engine control module (ECM) sees the hood switch circuit voltage higher than expected, indicating an open circuit, a faulty switch, or a wiring problem. The ECM uses this switch to know whether the hood is open, primarily for security and remote-start logic, and it sets the code when the signal stays above the normal threshold for a calibrated time.

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.