P257E
Engine Hood Switch Circuit Low
Body / hood switch
Generic OBD-II
Low
What it means
P257E means the ECM or body module detected low voltage (a short-to-ground or open) on the engine hood switch circuit. The hood switch senses whether the hood is open or closed and feeds the alarm and, on some cars, the active-hood pedestrian-protection system. It does not affect how the engine runs.
Low
Can I keep driving? Yes — the hood switch is a body-electronics input and does not affect engine operation.
Common symptoms
What you'll notice
- Check-engine or warning light on
- Hood-ajar indicator showing incorrectly
- Alarm or active-hood pedestrian-protection feature not working
- No change in how the engine runs
Common causes
Most likely first
- Short-to-ground or open in the hood switch wiringLikely
- Misadjusted or faulty hood switchCommon
- Corroded or loose connector at the switchCommon
- Rarely, a body-control-module faultLess often
How to diagnose & fix
Work through it in order
- Scan for codes and record freeze-frame data.
- Inspect the hood switch and its wiring and connector.
- Check the switch's adjustment and operation as the hood opens and closes.
- Measure the circuit voltage against specification.
- Repair or replace the switch, then clear and re-test.
FAQ
Quick answers
Is it safe to drive with P257E?+
Yes. The hood switch feeds the alarm and pedestrian-protection systems, not the engine, so drivability is unaffected.
Can I just clear P257E?+
It will return until the low-circuit fault or hood switch is repaired.
Related codes
Often seen with P257E
Read & clear P257E yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.
✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX