P054A
Cold Start B Camshaft Position Timing Over-Advanced Bank 1
Cold Start B Camshaft Position Timing Over-Advanced Bank 1: the control module has detected this fault condition. 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: medium
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.
- Phaser stuck in advanced positionCommon
Parts involved
- Cam Phaser B B1
- Oil Supply
P054A 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.