"A" Camshaft Timing Over-Advanced (Bank 1)
What it means
The intake camshaft on bank 1 is more advanced than commanded — a variable valve timing (VVT) fault.
Symptoms
Rough idle, power loss, rattle on start-up, higher fuel use.
Common causes
Low/dirty oil, faulty VVT/oil control valve, or a worn camshaft phaser.
Recommended action
Check oil level and condition first; inspect the oil control valve and VVT solenoid.
Related codes
FAQ — P0011
What does code P0011 mean?
"A" Camshaft Timing Over-Advanced (Bank 1). The intake camshaft on bank 1 is more advanced than commanded — a variable valve timing (VVT) fault.
What are the symptoms of P0011?
Rough idle, power loss, rattle on start-up, higher fuel use.
What causes P0011?
Low/dirty oil, faulty VVT/oil control valve, or a worn camshaft phaser.
What should I do about P0011?
Check oil level and condition first; inspect the oil control valve and VVT solenoid.
General reference based on the SAE J2012 standard. Exact causes for your vehicle may differ — when in doubt, consult a workshop.
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