OBD-II code · Powertrain (generic, extended)
P257F Engine Hood Switch Circuit High
The hood switch input reads stuck high — short to battery voltage or open switch return. The body controller cannot detect when the hood is opened.
Is it safe to drive with P257F?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelySwitch wire shorted to battery voltage
- Less likelyConnector pins corroded - high contact resistance
- Less likelySupply wire pinched against B+ source
Repair at a glance
- Difficulty
- Easy
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.2–1 h
- Emissions test
- Usually unaffected
- Parts involved
- Hood Switch
Related codes
- P254FEngine Hood Switch Circuit
- P257CVacuum Reservoir Control Circuit High
- P257DEngine Hood Switch Circuit Range/Performance
- P257EEngine Hood Switch Circuit Low
- P2580Turbocharger/Supercharger Speed Sensor A Circuit Low
- P2581Turbocharger/Supercharger Speed Sensor A Circuit High
- P2582Turbocharger/Supercharger Speed Sensor A Circuit Intermittent
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.