Powertrain
generic / SAE
P052A
Cold Start A Camshaft Position Timing Over-Advanced Bank 1
During cold-start cam phasing the ECU detects that the A camshaft on bank 1 is more advanced than the cold-start target by more than the diagnostic limit. Possible causes are an oil-pressure spike, a stuck phaser, or oil aeration that hydraulically locks the phaser advanced.
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number5 / 2A
Possible causes
- Phaser stuck in advanced position high
- Oil aerated or wrong viscosity medium
Symptoms
- Check engine light on
- Power loss especially in mid-rpm range
- Possible rough idle or stalling
- Increased fuel consumption
Inspection / repair
- Difficulty: medium
- DIY: shop recommended
- Estimated cost: 300–1500 €
- Estimated time: 2–5 h
- Component: cam phaser a b1
- Component: oil supply
- MIL / check engine light
- emissions-relevant
Sources
References
sae:J2012