P0012
Medium SeverityIntake Camshaft Position Timing Over-Retarded (Bank 1)
Engine System
What Does P0012 Mean?
The intake camshaft on bank 1 is more retarded than commanded by the ECM. This reduces engine performance and efficiency. Often related to oil viscosity issues or a failing VVT actuator.
Common Fix
Replace VVT solenoid and change oil
Estimated Cost (DIY)
$30 - $150
Symptoms
- ⚠️Loss of power
- ⚠️Poor fuel economy
- ⚠️Rough idle
- ⚠️Failed emissions test
Common Causes
Low or dirty engine oillikely
Faulty VVT solenoidlikely
Worn timing chainpossible
Incorrect oil viscositypossible
How to Diagnose P0012
- 1Verify oil level and condition
- 2Check VVT solenoid operation
- 3Inspect timing chain for stretch
- 4Verify correct oil viscosity is being used
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Frequently Asked Questions
- What causes P0012?
- P0012 is most commonly caused by dirty or low engine oil, a failing VVT solenoid, or a stretched timing chain.
- Can I drive with P0012?
- You can drive but expect reduced power and worse fuel economy. Fix it promptly to avoid potential timing chain issues.