P0011 – Meaning, Causes, Symptoms, & Fixes

Code P0011 Definition

Camshaft Position “A” – Timing Over -Advanced or System Performance (Bank 1)

What Does P0011 Mean?

Variable Valve/Camshaft Timing in the internal combustion engine control the intake and exhaust gases in and out of the gas combustion chamber. You want to vary the way your engine operates at different points of the engine’s rev range. Varying the different valve events: valve timing, valve duration, and valve lift allows the ECU to constantly make a call to the most power, the best mpg, and the lowest emissions. The different pistons that pump up and down leave the exhaust valves with the maximum air space that the engine can take in fuel and air to give you maximum power. When trouble code P0011 is set, it means that camshaft position “A” in Bank 1 is more advanced than the ECM has told it to be.

P0011 Symptoms

  • Check Engine Light
  • Hard start of the engine
  • Rough running engine
  • Increased fuel economy
  • Failed emissions test

P0011 Causes

  • The exhaust shaft has advanced too much when the ECM has told it to slow down to a lower timing level.
  • Camshaft variable timing solenoid failure
  • Camshaft phaser is seized in the advanced position
  • Continuous oil flow to Variable Camshaft Timing chamber
  • Viscosity of oil is too thick or too thin

Code P0011 Severity – Moderate   

The engine may have erratic and other engine problems that could affect driving and fuel economy may decrease due to increase fuel consumption. As for any Diagnostic Trouble Code it should be repaired as soon as possible for no internal damage.

Code P0011 Common Diagnosis Mistakes

Replacing sensors or components without any indication of a problem with the sensors or components.

P0011 Diagnosis

  • Tools Needed to Diagnose:
    • FIXD
    • Car specific service manual

Difficulty of Diagnosis and Repair – (1-4)

  1. Visually inspect the connector, wiring, or valve problems with the Oil Control Valve for bank 1 exhaust valve.
  2. Check the engine’s oil level and viscosity to see if they are correct.
  3. Check the live freeze frame data
    1. Monitor the timing of the data and disconnect the Oil Control Valve to the exhaust camshaft. If there is a change it means that the valve is working correctly and there is an electrical problem within the ECM.
  4. Find your vehicle specific service manual and follow the pinpoint tests to repair them as needed.
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Comments 5

Jeannette Nalley

October 27, 2018

Got an email from FIXD trouble code PO11.
Check engine light was on. Took my car to have the oil changed, and the check engine light went off. Thanks to FIXD!

FIXD Marketing

October 29, 2018

Awesome Jeannette! Glad we could help!


Jalaine Howell

November 16, 2018

I have a turbo charged engine everytime oil get really dirty check engine light come on with the cam shaft postion sensor I replaced part is it cause I’m letting the oil go to long before changing and also i just found out I need to be running a full synthetic oil well last two times I haven’t can it seize my engine like I was told

FIXD Marketing

November 17, 2018

Hi Jalaine! It is extremely important that you use the correct oil for you vehicle every time you change your oil. We suggest consulting your owner’s manual to find out what will work best for your specific vehicle.

Thanks, FIXD Team


November 21, 2018

A year ago I took my car into the dealership because when I was on the highway my car kept getting “stuck”. My foot would be on the gas and I could hear my engine reving but I would slow down. I took it into the dealership (because my warranty was almost up) and they told me it was “normal”). Fast forward to now, I bought FIXD and I find a camshaft issue. Should I be concerned that after all this time being ignored has severely injured my car?