P0319
Rough Road Sensor B Signal Circuit
A general electrical fault is reported on rough-road sensor B — used to gate misfire detection so that engine vibration from rough roads is not misclassified as misfire.
- Check engine light: Yes
- Emissions related: Yes
- Repair difficulty: medium
Common causes
Ordered by how often each turns out to be the cause.
- Sensor failedCommon
Parts involved
- Rough Road Sensor
P0319 is a generic OBD-II code defined by SAE J2012. Exact wording and diagnostic procedure vary by manufacturer and model. Code definitions are drawn from the public-domain OBDex dataset; the workshop notes are our own.