P0011 Intake Camshaft Position Timing Over-Advanced Bank 1

P0011 means the intake camshaft timing on bank 1 is more advanced than expected. The cam may be physically advanced, slow to return, or reported incorrectly.

Code details

Generic OBD-II · P0

System: Fuel / Air
Code type: Generic (SAE / ISO controlled)
Standard: SAE J2012 / ISO 15031-6

Diagnostic boundary

A diagnostic trouble code reports that a monitored test failed. It does not prove one specific part is bad, and manufacturer logic can add vehicle-specific conditions.

Do not treat P0011 as only a sensor code; oil control, actuator sticking, and mechanical timing can all create an over-advanced cam result.

Symptoms of P0011

Rough idle, hesitation, or reduced power.
Check-engine light.
Occasionally a rattle at start-up.

Common causes of P0011

Dirty or low oil restricting the cam (VVT) actuator.
A stuck oil-control / VVT solenoid.
A failed camshaft actuator/phaser.
Timing-chain wear or stretch.

Useful checks before replacing parts

Check engine oil level, viscosity, contamination, service history, and oil-control-valve screen condition where accessible.
Compare commanded and actual cam angle at idle and during a controlled RPM change.
Inspect the cam actuator solenoid, phaser operation, timing-chain or belt condition, and cam/crank correlation data.

Related OBD-II codes

These nearby fuel / air entries can help compare wording and pin down the fault area.