What does code P0021 mean and is it safe to drive?
P0021: Camshaft Position A – Timing Over-Advanced or System Performance (Bank 2). Here’s what it means, what usually causes it, what repairs typically cost, and how urgent it is to keep driving.
PowertrainGenerally safe to drive
Repair cost
$100–$1200
System
Powertrain
Urgency
medium
What this code means
Same as P0011 but for the intake cam on bank 2. On V6/V8 engines, P0011 and P0021 appearing together strongly points to an oil-related cause affecting both banks.
Common causes
- Low or dirty oil affecting both bank VVT systems
- Failed bank 2 intake cam OCV
- Timing chain stretch on bank 2
Symptoms
- Check Engine Light
- Rough idle or rattling
- Poor fuel economy
Typical fixes
- Oil change with correct viscosity
- Replace bank 2 intake cam OCV
- Timing chain service if worn
Repair cost range
Repairs for P0021 often fall between $100 and $1200, depending on the cause and your vehicle.