Intake Camshaft Position Timing Over-Advanced (Bank 1)
The P0011 code means the vehicle's onboard diagnostic system has detected: Intake Camshaft Position Timing Over-Advanced (Bank 1). This is a moderate severity code.
- Keep driving?
- Yes, but fix soon
- DIY difficulty
- medium
- Estimated cost
- $80-$400 for OCV/VVT solenoid replacement; $900-$2,500+ if a worn timing chain, tensioner, or cam phaser must be replaced
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Common Symptoms
- Check Engine Light on
- Rough idle
- Rattling noise on cold start
- Reduced power
- Poor fuel economy
Probable Causes (Ranked by Likelihood)
- Stuck-open or faulty oil control valve Very High
- Low oil pressure from worn pump or low level High
- Sludged oil passages blocking actuator High
- Worn timing chain causing false advance reading Moderate
- Failed camshaft position actuator Low
Step-by-Step Diagnostic Procedure
-
Check oil level and condition first. Dirty or low oil is a top cause of VVT issues.
-
Clear the code and monitor camshaft advance angle at idle. If it reads advanced when it should be at 0 degrees, the OCV is stuck open.
-
Remove and inspect the OCV for debris. Clean or replace as needed.
-
Check oil pressure with a mechanical gauge. Low pressure under 10 psi at idle indicates pump wear.
-
Inspect timing chain for slack: excessive slack causes erratic cam angle readings.
Common Fixes by Vehicle
What techs usually find when diagnosing P0011 on specific vehicles — tap your vehicle for the fix and the exact part:
2007-2017 Toyota Camry 2.5L Easy DIY
VVT oil control valve (OCV) is stuck in the advanced position. Replace the intake camshaft OCV (Denso 15330-28020). Before replacing, check engine oil level and condition -- low or dirty oil causes VVT solenoid sticking. Use 0W-20 synthetic per Toyota spec and change oil every 5,000 miles to prevent recurrence.
Labor: 0.5-1 hour2012-2019 Chevrolet Equinox/GMC Terrain 2.4L Ecotec Easy DIY
Intake cam actuator solenoid fails or gets clogged with sludge. GM TSB #14-06-01-002A. Replace the solenoid (ACDelco 12655421) and perform an oil change with Dexos1-approved 5W-30. If timing chain is stretched, the solenoid alone will not fix the issue. Check for cold-start rattle indicating chain wear.
Labor: 0.5 hour2008-2016 BMW 328i/X3 N20/N52 Moderate DIY
VANOS solenoid is stuck or the intake VANOS actuator has failed. Common on N20 and N52 engines above 80K miles. Replace the intake VANOS solenoid first (BMW 11367585425). If code returns, the VANOS actuator gear may have stripped teeth. Check for oil sludge in the VANOS ports on the cylinder head.
Labor: 0.5-1 hour2011-2020 Hyundai Sonata/Kia Optima 2.4L Theta II Easy DIY
Oil control valve for the intake cam sticks from sludge buildup. These Theta II engines are prone to oil consumption which starves the VVT system. Replace the OCV (Hyundai 24355-2G500) and change the oil. Check oil consumption rate -- if burning over 1 qt per 1000 miles, the engine may qualify for Hyundai/Kia warranty extension.
Labor: 0.5 hourFrequently Asked Questions
What does over-advanced mean for cam timing?
The camshaft is positioned further ahead than the PCM commanded. This usually means the OCV is stuck open, allowing too much oil pressure to hold the actuator advanced.
Can an oil change fix P0011?
Sometimes yes. If sludge was blocking the OCV, fresh oil and a new filter may clear it. Always start with an oil change before replacing parts.
Sources
This page is built from documented references. Verify against your own service info before repair work.
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