P0011
A Camshaft Position - Timing Over-Advanced or System Performance (Bank 1)P0011 is a generic OBD-II powertrain diagnostic trouble code: A Camshaft Position - Timing Over-Advanced or System Performance (Bank 1). It is logged by the engine control unit when the ckp/cmp monitor detects that a specific fault threshold has been exceeded — typically resulting in the malfunction-indicator lamp (MIL / check-engine light) being illuminated.
What P0011 means
DTC P0011 is a generic powertrain code that indicates the engine control module (ECM) has detected that the actual position of the intake camshaft on bank 1 is more advanced than the position commanded by the ECM, or that the variable valve timing (VVT) system response is out of the expected performance range. Bank 1 is the side of the engine that contains cylinder number one.
Modern engines use variable valve timing to optimize power, fuel economy, and emissions across the rev range. The ECM commands a camshaft actuator (oil control valve) to route engine oil pressure to a phaser on the camshaft, which rotates the cam relative to the crankshaft. The ECM compares the commanded position to the actual position reported by the camshaft and crankshaft position sensors. When the difference exceeds a calibrated threshold for a calibrated time, P0011 is stored.
Because the system relies on clean, correct-viscosity engine oil at the right pressure, P0011 is frequently rooted in oil-related issues rather than a failed electronic part. Driving with this code can lead to rough running, poor economy, and over time may accelerate timing component wear.
Common causes
Most-frequently reported root causes when P0011 is logged.
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1
Low engine oil level or oil that is overdue for a change (sludged or wrong viscosity)
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2
Stuck or contaminated camshaft oil control valve (VVT solenoid) on bank 1
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3
Clogged VVT oil control passage, screen, or filter feeding the bank 1 phaser
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4
Failed or worn camshaft phaser/actuator on the bank 1 intake camshaft
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5
Stretched timing chain or jumped/incorrect cam timing on bank 1
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6
Faulty camshaft or crankshaft position sensor giving incorrect correlation
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7
Wiring or connector problems at the VVT solenoid (chafe, corrosion, poor contact)
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8
ECM/PCM software issue or, rarely, a failed control module
Symptoms drivers notice
How to diagnose P0011
A typical diagnostic flow when this code is present.
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1
Scan for all stored and pending DTCs and record freeze-frame data before clearing anything.
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2
Check engine oil level and condition; verify the correct viscosity and that service intervals have been met.
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3
Review live data for commanded vs. actual camshaft position, RPM, coolant temperature, and oil temperature to see when the deviation occurs.
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4
Inspect the bank 1 camshaft oil control valve (VVT solenoid) wiring and connector for damage, and check resistance against the service manual spec.
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5
Remove and inspect the VVT solenoid for debris or sticking; clean or test its operation per the manufacturer's procedure.
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6
Check the timing chain, guides, and tensioner for wear or stretch, and verify cam-to-crank timing marks if internal wear is suspected.
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7
If wiring, oil, and solenoid all check out, evaluate the camshaft phaser/actuator and finally the ECM as the last step.
Related powertrain codes
- P000A — A Camshaft Position Slow Response Bank 1
- P000B — B Camshaft Position Slow Response Bank 1
- P000C — A Camshaft Position Slow Response Bank 2
- P000D — B Camshaft Position Slow Response Bank 2
- P0010 — A Camshaft Position Actuator Circuit (Bank 1)
- P0012 — A Camshaft Position - Timing Over-Retarded (Bank 1)
Frequently asked questions
Is it safe to drive with a P0011 code?
Short trips to a shop are usually fine if the engine runs smoothly, but you should not ignore it. Continued driving with poor cam timing can hurt fuel economy, increase emissions, and accelerate wear on the timing chain, phasers, and other internals.
Will an oil change fix P0011?
Sometimes, yes. Low, dirty, or wrong-viscosity oil is one of the most common root causes because the VVT system is hydraulically actuated. A fresh oil and filter change with the manufacturer-specified viscosity is a reasonable first step before replacing parts.
What is the difference between P0011 and P0021?
They describe the same fault (intake camshaft over-advanced or VVT performance) but on different banks. P0011 refers to bank 1, the side with cylinder #1, while P0021 refers to bank 2. On inline engines you will typically only see P0011.
Can I just replace the VVT solenoid and be done?
Not reliably. The solenoid is a common culprit, but blind replacement without checking oil condition, wiring, and live data often leaves the real cause (sludge, stretched chain, failed phaser) in place and the code returns.
Disabling P0011 in software
RaceTune can permanently disable P0011 — and any other OBD-II diagnostic trouble code — on every ECU family we support. The monitor is disabled inside the ECU itself, so the fault stops being logged: the warning light stays off and the engine never enters limp mode for this code. The change is tied to your exact software version.
Software modifications affect emissions compliance and are not road-legal in many jurisdictions. RaceTune service files are intended for motorsport, off-road, and export use.
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