OBD-II code · Powertrain (generic)
P0318 Rough Road Sensor A Signal Circuit
A general electrical fault is reported on rough-road sensor A — used to gate misfire detection so that engine vibration from rough roads is not misclassified as misfire.
Is it safe to drive with P0318?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelySensor failed
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.5–2 h
- Emissions test
- Likely to fail
- Parts involved
- Rough Road Sensor
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.