P0011 - A Camshaft Position - Timing Over-Advanced or System Performance Bank 1
P0011 is a generic powertrain diagnostic trouble code indicating A Camshaft Position - Timing Over-Advanced or System Performance Bank 1. It relates to the Fuel & Air Metering and Auxiliary Emission Controls system.
DTC Breakdown (SAE J2012)
| System | Powertrain (P) |
| Type | Generic |
| Subsystem | Fuel & Air Metering and Auxiliary Emission Controls |
| Fault Index | 11 |
| Standard | SAE J2012 / ISO 15031-6 |
What does diagnostic code P0011 mean?
The intake camshaft position timing on Bank 1 is over-advanced or system performance is failing, indicating the camshaft is out of sync with the engine computer's commanded position.
Severity Level & Driveability Details
Severity: High
Oil pressure controls VVT. Low oil can cause internal engine damage. Chain wear can cause engine timing to jump.
Common Symptoms of P0011
- Rattling noise from engine.
- Rough idle.
- Loss of power.
- Stalling.
- The check engine light will illuminate on the dash when P0011 is active.
Typical Causes for P0011
- Low engine oil level or dirty engine oil (clogging oil passages).
- Failed VVT control solenoid (oil control valve).
- Clogged VVT oil filter screen.
- Stretched timing chain.
Diagnostic and Troubleshooting Steps
Check engine oil level and condition. Check oil pressure. Activate the VVT solenoid using a bi-directional scan tool; the engine should stumble at idle. Test solenoid resistance.
Typical Repairs and Fixes
- Performing oil and filter change.
- Replacing VVT control solenoid.
- Cleaning VVT oil screens.
- Replacing timing chain and tensioners.
Sensor Location & Parts Involved
The VVT solenoid is mounted on the cylinder head near the camshaft gear, while the cam phaser is on the end of the camshaft itself.
Clearing Code & Recurrence
Reset codes with a scan tool and perform a road test to verify VVT solenoid operation.
Emissions & Smog Inspection Impact
Incorrect valve timing leads to incomplete combustion and elevated tailpipe emissions.
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Related Diagnostic Codes
Sources & References
This diagnostic guide is compiled and verified against the following authority sources:
- NHTSA TSB Bulletins
- EPA OBD regulations
Frequently Asked Questions about P0011
What does the Bank 1 intake camshaft timing over-advanced code P0011 mean?
The engine computer logged P0011 after detecting a Variable Valve Timing (VVT) issue with the Bank 1 intake camshaft, indicating a over-advanced fault.
Is it safe to drive with the Bank 1 intake camshaft timing over-advanced code P0011 active?
No, VVT timing faults can damage internal engine parts if left unresolved.
How much does it cost to repair a Bank 1 intake camshaft timing over-advanced code P0011 fault?
An oil change is $50-$80. Solenoid replacement runs $150-$350. Replacing the timing chain is a major mechanical job costing $1,200-$2,500.
What are the common causes of the Bank 1 intake camshaft timing over-advanced code P0011?
Trigger conditions for the Bank 1 intake camshaft timing over-advanced code P0011 include: VVT oil control solenoid stuck open for the Bank 1 intake camshaft., Camshaft phaser gear mechanical lock pin failing to engage on Bank 1., Low or contaminated engine oil restricting phaser movement..
Can I clear the check engine light for Bank 1 intake camshaft timing over-advanced code P0011?
Reset codes with a scan tool and perform a road test to verify VVT solenoid operation.
Will the Bank 1 intake camshaft timing over-advanced code P0011 cause an inspection failure?
Incorrect valve timing leads to incomplete combustion and elevated tailpipe emissions.