Share a caseSign in
Engine mechanicalSeverity Medium: diagnose soon

P0011"A" Camshaft Position – Timing Over-Advanced or System Performance (Bank 1)

What it means

The intake (or left/front) camshaft, bank 1, is more advanced than the ECU asked for, or doesn't follow the command. Most often an oil problem or a sticking oil control valve.

Symptoms

  • Check engine light
  • Rough idle or stalling
  • Loss of power or poor fuel economy
  • Rattle on start-up (worn phaser)

Common causes

  • Low oil level, wrong oil viscosity or sludge
  • Sticking oil control valve or blocked filter screen
  • Worn cam phaser
  • Stretched timing chain or wrong timing

What to check first

  1. Check oil level, grade and condition first
  2. Compare desired and actual cam angle in live data
  3. Remove and inspect the oil control valve and its screen
Can I drive with P0011? Usually yes for a short distance, but performance or economy may suffer and the fault can get worse. Diagnose it soon.

Generic OBD-II meaning. Manufacturer-specific meanings and checks can differ; always check the service information for the car.

How to test the parts behind P0011

Camshaft position sensor (CMP)Wiring, typical values, multimeter and scope tests

Cases with P0011 (0)

Share yours

No published cases with this code yet.

Colleagues asking about P0011

Ask for help

Stuck on P0011? Describe what you measured and ask the community.

P0011: questions and answers

What does P0011 mean?

P0011: "A" Camshaft Position – Timing Over-Advanced or System Performance (Bank 1). The intake (or left/front) camshaft, bank 1, is more advanced than the ECU asked for, or doesn't follow the command. Most often an oil problem or a sticking oil control valve.

What are the symptoms of P0011?

Check engine light. Rough idle or stalling. Loss of power or poor fuel economy. Rattle on start-up (worn phaser).

What causes P0011?

Low oil level, wrong oil viscosity or sludge. Sticking oil control valve or blocked filter screen. Worn cam phaser. Stretched timing chain or wrong timing.

How do you diagnose P0011?

1. Check oil level, grade and condition first 2. Compare desired and actual cam angle in live data 3. Remove and inspect the oil control valve and its screen

Can I drive with P0011?

Usually yes for a short distance, but performance or economy may suffer and the fault can get worse. Diagnose it soon.