Powertrain
generic / SAE
P0021
"A" Camshaft Position - Timing Over-Advanced (Bank 2)
The bank 2 intake camshaft is more advanced than commanded, or the actuator does not respond as expected. Often caused by stuck-open oil control valves, sludge in VVT passages, or low oil pressure.
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number– / 21
Possible causes
- Oil control valve stuck (advance) high
- Sludge in VVT passages 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: possible
- Estimated cost: 80–800 €
- Estimated time: 0.5–4 h
- Component: camshaft position actuator
- Component: oil control valve
- MIL / check engine light
- emissions-relevant
- drive cycle required
Sources
References
sae:J2012