CodeXOBD

P0011 — Camshaft Position Timing Over-Advanced (Bank 1)

P0011 means the intake camshaft timing is more advanced than the module requested. A stuck VVT solenoid or a clogged oil control valve is the usual cause.

Moderate

The engine may idle roughly, surge at cruise, or feel down on power at low RPM. Over-advanced timing can also cause knocking under load.

$30–$300Parts, typical range
0.5–3 hLabour
estimateNot a quote · 2026 basis

What P0011 means

The variable valve timing system adjusts intake camshaft position using oil pressure controlled by a solenoid. The module commands a target position and monitors the actual camshaft position via the camshaft position sensor. P0011 sets when the actual timing remains more advanced than commanded for a calibrated period, usually because the oil control valve is stuck open or the actuator cannot return to its default position.

Technical summary
SystemPowertrain — fuel and air metering
How the fuel mixture is decidedAir passes the mass airflow sensor, then the throttle, into the intake manifold and the cylinder. The module injects fuel to match the measured air, and the upstream oxygen sensor reports the result so it can correct itself. Air entering after the sensor was never measured, which is why a leak downstream of it makes the mixture run lean.Air inAirflow sensormeasures massThrottleCylinderfuel added hereO₂ sensorreports resultAny air entering after the sensor is fuel the module never accounted for

Symptoms you may notice

What causes P0011

Oil control valve stuck in the advanced position

Very likelylow costmoderate

Sludge or debris prevents the valve from returning to its default position, holding the camshaft in the advanced state. An oil change with fresh filter sometimes frees it.

VVT actuator seized or sticking

Likelymedium costmoderate

The mechanical actuator on the camshaft can stick due to wear or oil contamination. On some engines this requires camshaft removal.

Incorrect oil viscosity or degraded oil

Possiblelow costeasy

Using oil that is too thick or too thin for the engine can prevent the VVT system from responding correctly. Extended oil change intervals amplify this.

How to diagnose it

1

Check oil level, viscosity, and condition

Verify the correct oil specification is used and the oil is not heavily degraded. Wrong viscosity is a common and cheap-to-fix cause.

Tools: DipstickIf it passes: Oil is correct and clean. Continue to step 2.If it fails: Change oil and filter with the correct specification, clear the code, and drive through a full drive cycle.
2

Inspect and test the oil control valve

Remove the oil control valve solenoid and inspect for sludge or debris. Test its operation by applying battery voltage — it should click and the plunger should move freely.

Tools: Basic hand tools, MultimeterIf it passes: Valve operates correctly. Continue to step 3.If it fails: Clean or replace the valve, clear the code, and re-test.
3

Check camshaft position sensor signal

Monitor the camshaft position sensor signal with a scan tool. Compare against the crankshaft position sensor to verify the timing relationship is plausible.

Tools: OBD-II scanner with live dataIf it passes: Sensor signal is plausible. The actuator itself may be the fault.If it fails: Sensor is reading incorrectly — replace and re-test.

Related codes

P0010P0012P0021

Common questions

Can an oil change fix P0011?

Sometimes, yes. If the cause is sludge or incorrect viscosity, a fresh oil change with the manufacturer-specification oil and a new filter can resolve it within a drive cycle or two.

Is it safe to drive with P0011?

Short-term, usually yes. Over-advanced timing can cause engine knock under heavy load, so avoid hard acceleration until it is fixed.

Last verified 2026-07-27 · Sources: SAE J2012 — Diagnostic Trouble Code Definitions and Failure Type Byte (SAE International)

This information is for general guidance and is not a substitute for professional diagnosis. Cost figures are estimates, not quotes.