P0011: Camshaft Timing Over-Advanced (Bank 1)
The P0011 code indicates that the engine control module (ECM) has detected that the camshaft timing on bank 1 is over-advanced relative to the crankshaft position, or the variable valve timing (VVT) system is not performing within expected parameters. This typically occurs when the oil control solenoid (OCV) or VVT actuator fails to adjust timing properly due to sludge, low oil pressure, or electrical issues. Bank 1 refers to the side of the engine containing cylinder 1.
01. Most Common Causes
- Low or dirty engine oil
- Faulty oil control solenoid (OCV)
- Stuck or failed VVT actuator
- Worn timing chain or tensioner
- Engine sludge or debris in VVT system
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Rough idle or engine misfire
- Reduced engine power or hesitation
- Poor fuel economy
- Engine knocking or rattling noise
03. Step-by-Step Diagnosis
Step 1: Scan for codes and record freeze frame data.
Step 2: Check engine oil level and condition; change if dirty or low.
Step 3: Inspect wiring and connector to the oil control solenoid.
Step 4: Test oil control solenoid resistance and operation with a scan tool.
Step 5: Perform a mechanical timing check to verify chain/belt alignment.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended. Driving with P0011 can cause poor performance, increased emissions, and potential engine damage if timing is severely off.
How much does it cost to fix?▼
Repair costs range from $150 to $400 for parts and labor, depending on the cause. Oil change and solenoid replacement are on the lower end; timing chain repair can be higher.