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
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References
sae:J2012