P0018
Crankshaft Position - Camshaft Position Correlation (Bank 2 Sensor A)
Crankshaft Position - Camshaft Position Correlation (Bank 2 Sensor A): the value does not correlate with the related sensor or expected pattern. This relates to engine timing; a fault can cause rough running, a no-start, or timing errors.
- Check engine light: Yes
- Emissions related: Yes
- Repair difficulty: hard
Symptoms
- Check engine light on
- Power loss especially in mid-rpm range
- Possible rough idle or stalling
- Increased fuel consumption
Common causes
Ordered by how often each turns out to be the cause.
- Timing chain stretched (bank 2)Common
- Bank 2 cam phaser failedPossible
Parts involved
- Timing Chain
- Camshaft Position Sensor
- Crankshaft Position Sensor
P0018 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.