P0011
Fix within a few daysYour engine's computer detected that the camshaft on Bank 1 (the side with cylinder #1) is too far advanced, or not moving correctly, affecting valve timing.
Code P0011 means your engine's camshaft timing on Bank 1 is over-advanced. Common causes: Low/dirty oil (30%), bad VVT solenoid (45%), faulty cam sensor (10%). Drivability: Yes, for short trips. Repair cost: $30-$150 DIY, $150-$400 professional.
Can I Drive With P0011?
Yes, for short trips only
Essential trips under 10 miles, avoid highways and heavy acceleration. Fix immediately.
Stop driving immediately if: Flashing check engine light, loud engine knocking, significant power loss, or burning smell.
Symptoms of P0011
- 1Rough or erratic idle
- 2Reduced engine power or acceleration
- 3Decreased fuel economy
- 4Engine knocking or ticking noises
- 5Hard starting
Common Causes of P0011
Parts most likely causing this code, ranked by probability
The Variable Valve Timing (VVT) system relies on clean engine oil at the correct level and pressure to operate the cam phasers.
30% of P0011 cases are fixed by addressing oil level or quality
This solenoid controls the oil flow to the cam phaser, and if it's stuck or faulty, it can't adjust the camshaft timing correctly.
45% of P0011 cases are fixed by replacing the VVT solenoid
A faulty camshaft position sensor can send incorrect timing signals to the engine computer, leading to a P0011 code.
10% of P0011 cases are fixed by replacing the camshaft position sensor
A stretched timing chain or worn guides can cause the camshaft to be out of sync with the crankshaft, resulting in incorrect timing.
10% of P0011 cases are fixed by repairing timing chain components
The cam phaser itself can fail internally, preventing the camshaft from adjusting its timing as commanded by the VVT solenoid.
5% of P0011 cases are fixed by replacing the cam phaser
Check These First (Before Buying Parts)
- Check your engine oil level and condition. Low or dirty oil is a primary cause of VVT system malfunctions. Top off or change the oil if needed.
- Inspect the electrical connector and wiring to the VVT solenoid on Bank 1 for any damage or corrosion.
How to Diagnose P0011
- 1Check engine oil level and condition; perform an oil change if necessary.
- 2Inspect the wiring and electrical connector for the VVT solenoid on Bank 1.
- 3Test the resistance of the VVT solenoid with a multimeter; compare to factory specifications.
- 4Remove and visually inspect the VVT solenoid for sludge or debris; clean if possible.
- 5Test the operation of the VVT solenoid by applying battery voltage to see if it clicks.
- 6Monitor camshaft position sensor readings with a scan tool to check for erratic signals.
- 7If all else checks out, inspect timing chain tension and guides for wear or slack.
P0011 on Popular Vehicles
Honda Accord
2003-2024Honda vehicles, including the Accord, are particularly sensitive to oil quality and level for their VTEC/VVT systems. A clogged or failing VVT solenoid (spool valve) is a very common cause.
60% fixed by replacing VVT solenoid or performing oil change
Toyota Camry
2007-2024Toyota's VVT-i system can trigger P0011 due to sludge buildup from infrequent oil changes, or a failing VVT solenoid. Sometimes, simply cleaning the solenoid can resolve the issue.
55% fixed by replacing VVT solenoid or performing oil change
Ford F-150
2004-2024Ford's 3-valve engines (e.g., 5.4L Triton) are notorious for P0011/P0021 codes, often linked to failing VVT solenoids, cam phasers, or stretched timing chains, especially if oil pressure is low or oil changes are skipped.
50% fixed by replacing VVT solenoid or cam phaser
Frequently Asked Questions
What does P0011 mean?
P0011 indicates that the engine's computer has detected an issue with the 'A' camshaft position on Bank 1, specifically that the timing is over-advanced or the Variable Valve Timing (VVT) system is not performing as expected.
Can I drive with P0011?
Yes, you can drive for short trips, but you must fix this code within a few days. Continued driving with P0011 can lead to reduced engine performance, poor fuel economy, and potentially more severe engine damage if ignored.
Will P0011 clear itself?
No, P0011 will not clear itself. The engine computer stores this code until the underlying issue is resolved and the system passes its self-test. You will need to fix the problem and then clear the code with a scan tool.
How do I fix P0011 myself?
Start by checking your engine oil level and condition; change the oil and filter if needed. If that doesn't fix it, locate and replace the VVT solenoid on Bank 1. If the problem persists, you might need to test or replace the camshaft position sensor.
How much does it cost to fix P0011?
DIY repair costs for P0011 typically range from $30-$150, mainly for an oil change, VVT solenoid, or camshaft position sensor. Professional shop repairs usually cost $150-$400, including parts and labor for these common fixes.
P0011 keeps coming back - why?
If P0011 keeps returning, it often means the initial repair didn't address the root cause. Common reasons for recurrence include persistent low or dirty oil, a faulty cam phaser, a stretched timing chain, or a wiring issue that was overlooked.
Will P0011 fail emissions/smog test?
Yes, P0011 will cause your vehicle to fail an emissions or smog test. The check engine light being on automatically results in a failure, and issues with valve timing directly impact engine emissions.
What's the difference between P0011 and P0012?
P0011 indicates the 'A' camshaft timing on Bank 1 is over-advanced. P0012 indicates the 'A' camshaft timing on Bank 1 is over-retarded. Both point to issues with the VVT system on Bank 1, but in opposite directions of timing adjustment.
P0011 on Honda Accord
On Honda Accords, P0011 is frequently caused by a faulty VVT solenoid (also known as the VTEC oil pressure switch or spool valve) or neglected oil changes. Ensure you use the correct oil viscosity and keep up with maintenance.
Questions to Ask Your Mechanic
Did you check the engine oil level and condition before diagnosing?
Good answer: Yes, the first step was to confirm the oil was at the correct level and not excessively dirty. We also checked for any sludge.
What were the live data readings for the Bank 1 camshaft position sensor and VVT solenoid duty cycle?
Good answer: We monitored the actual vs. desired cam angle and the solenoid's commanded position. The actual cam angle was consistently outside the target range, and the solenoid wasn't responding as expected.
Did you test the VVT solenoid's electrical resistance and operation?
Good answer: Yes, we checked the resistance across the solenoid terminals and confirmed it was within specifications. We also applied power to ensure it clicked and moved freely.
Repair Cost Estimate
DIY Repair
Parts only
$30-$150
Shop Repair
Parts + labor
$150-$400
Save $120-$250 by doing it yourself
Difficulty
intermediate
Time
1-3 hours
Intermediate - requires basic mechanical skills, a scan tool for diagnosis, and potentially a multimeter for testing electrical components.
Cost of Waiting
Ignoring P0011 can lead to significant engine damage. Continued incorrect valve timing causes reduced engine efficiency, increased wear on internal components, and can send unburned fuel into your exhaust, destroying your catalytic converter ($800-$2,500 repair). A $50-$150 VVT solenoid fix now prevents a $1,000+ bill later.
While You're In There...
The VVT system relies heavily on clean engine oil. If you're diagnosing or replacing VVT components, it's smart to ensure your oil and filter are fresh to prevent future issues.
These seals are often included with a new solenoid, but if not, replace them to prevent oil leaks and ensure proper sealing when reinstalling the solenoid.
Tools You'll Need
- OBD-II Scan Tool
- Socket Wrench Set
- Multimeter
- Screwdrivers
- Oil Filter Wrench (if changing oil)
- Drain Pan (if changing oil)
P0011 is a common engine code, especially on vehicles with Variable Valve Timing. Most repairs are straightforward, often involving an oil change or a VVT solenoid replacement, and your engine will run smoothly afterward.
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Your Next Steps
Step 1: Check your engine oil. Ensure it's at the correct level and clean. If it's low or dirty, perform an oil and filter change.
Step 2: If the oil check doesn't fix it, locate the VVT solenoid on Bank 1. Inspect its wiring and connector. Test the solenoid's resistance and operation. Replace the VVT solenoid if it's faulty.
Step 3: If the code persists after replacing the VVT solenoid, consider testing or replacing the camshaft position sensor. If all else fails, a deeper dive into timing chain components or the cam phaser may be necessary.