What does code P0011 mean on a Mazda and is it safe to drive?
P0011: Camshaft Position A – Timing Over-Advanced or System Performance (Bank 1). Here's what it means on your Mazda, what usually causes it, what repairs typically cost, and how safe it is to keep driving.
What this code means
The intake camshaft on bank 1 is more advanced than the PCM commanded, or the VVT system isn't responding as expected. Often caused by low/dirty oil or a faulty oil control valve.
Common causes for your Mazda
- Low or dirty engine oil (most common—change oil first)
- Failed or sludged oil control valve (OCV/VVT solenoid)
- Stretched or worn timing chain
- Stuck VVT actuator (cam phaser)
Symptoms
- Check Engine Light
- Rough idle or rattling on cold startup
- Poor fuel economy
- Reduced power
Typical fixes
- Oil change with correct viscosity oil (often resolves it)
- Clean or replace oil control valve
- Replace timing chain if stretched
- Replace cam phaser if faulty
Repair cost range
For a Mazda, repairs for P0011 often fall between $50 and $1200, depending on the cause and whether you use OEM or aftermarket parts. Labor rates vary by location.
Known issues on Mazda
Mazda SKYACTIV-G engines flag P0011 from dirty VVT solenoid screens. Mazda specifies 0W-20 full synthetic oil; dirty oil is the primary cause and most cases resolve with an oil change.
Most commonly affected models