Powertrain
generic / SAE
P0012
"A" Camshaft Position - Timing Over-Retarded (Bank 1)
The bank 1 intake camshaft remains retarded compared to commanded position. Common causes include a stuck-closed oil control valve, blocked oil passages, or a worn cam phaser.
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number– / 12
Possible causes
- Oil control valve stuck (retard position) high
- Cam phaser internally worn 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: 80–1000 €
- Estimated time: 0.5–5 h
- Component: camshaft position actuator
- Component: oil control valve
- Component: cam phaser
- MIL / check engine light
- emissions-relevant
- drive cycle required
Sources
References
sae:J2012