Powertrain, generic · Fuel and air metering, auxiliary emission controls
P0011 "A" Camshaft Position - Timing Over-Advanced or System Performance (Bank 1)
Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modePossible
The engine control module compares the commanded position of the intake camshaft on bank 1 with the actual position it calculates from the camshaft and crankshaft sensors. This code is set when the camshaft sits further advanced than commanded for longer than a calibrated time, or, depending on the manufacturer, when the target is missed in either direction ("system performance"). Typical cause is a phaser that does not return to its rest position, for example because the oil control valve sticks open or its screen is clogged. Bank 1 is the cylinder bank that contains cylinder 1.
Likely causes
Oil level too low, oil sludged or wrong viscosity
Screen at the oil control valve clogged with debris
Oil control valve mechanically sticking
Cam phaser worn or its locking pin sticking
Timing chain worn or fitted incorrectly after a repair
Symptoms
- Check engine light on
- Rough or unstable idle, as valve overlap is too large
- Engine may stall at idle
- Rattling from the timing drive at cold start
- Higher fuel consumption
Repair estimate
DifficultyMediumDIY possible
Parts and labour€60–1,800
Time0.5–8 h
Typical range across vehicles; the real cost depends on what the testing finds.
What to check first
- Check oil level and condition first
- Inspect the solenoid screen for debris
- Compare commanded and actual cam angle with a scan tool
- Check timing chain stretch data if available
Parts involved
cam phaser intake bank1oil control valve intake bank1engine oiltiming chain
Related codes
References: law.cornell.edu, saabwisonline.com, saabwisonline.com, static.nhtsa.gov.