P0149
Fuel Timing Error
Injection timing deviates from target. Often caused by chain wear, sensor offset, or injector response drift.
- Check engine light: Yes
- Emissions related: Yes
- Repair difficulty: hard
Common causes
Ordered by how often each turns out to be the cause.
- Timing chain stretchedCommon
Parts involved
- Timing Chain
- Fuel Injectors
- Crankshaft Position Sensor
P0149 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.