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OBD fault code guide

P0011 Code Meaning UK

P0011 means “Camshaft Position Timing Over Advanced Bank 1”. In plain English, the engine computer thinks the camshaft timing is too far advanced compared with where it should be. Common causes include low or dirty oil, incorrect oil grade, faulty VVT solenoid, blocked oil passages, camshaft sensor faults, wiring issues or timing chain stretch.

📅 Updated June 2026 🇬🇧 UK diagnostic guide 🛠 Camshaft timing fault
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Quick answer

What does P0011 mean?

P0011 means the ECU has detected that the camshaft timing on bank 1 is too advanced. This usually relates to the variable valve timing system, oil control, camshaft position readings or the mechanical timing of the engine. It should not be ignored because timing problems can affect starting, idle quality, power, emissions and engine reliability.

Most likely area

Engine oil condition, VVT solenoid, camshaft sensor, wiring, oil passages or timing chain system.

Urgency

Moderate to high. More urgent if there is rattling, rough running, stalling or oil pressure warning.

MOT risk

Can affect emissions, engine warning light status and general running condition.

Code meaning

P0011 — Camshaft Position Timing Over Advanced

The full description is usually P0011 Camshaft Position Timing Over Advanced or System Performance Bank 1. Bank 1 means the side of the engine containing cylinder 1. On many four-cylinder engines, bank 1 is the only bank.

Modern engines often use variable valve timing to adjust camshaft position depending on speed, load and driving conditions. The ECU expects the camshaft to move to a commanded position. If the camshaft ends up too far advanced, moves slowly, sticks, or does not match the expected reading, the ECU may store P0011.

Mechanic view

Why P0011 needs proper diagnosis

P0011 is often linked to oil quality and oil flow. The VVT system relies on clean oil at the correct pressure. Low oil, dirty oil, wrong oil grade or blocked oil galleries can stop the camshaft timing system from working correctly.

The mistake is replacing a camshaft sensor straight away without checking oil level, oil condition, VVT solenoid operation and mechanical timing first.

Symptoms

Common symptoms of a P0011 code

Symptoms can range from only an engine warning light to rough running, poor starting, rattling noise and reduced power.

Engine management light

The most common sign is a stored P0011 code with the engine warning light on.

Rough idle

Incorrect cam timing can make the engine idle unevenly, shake, hunt or feel unstable.

Poor starting

The car may crank longer than normal or struggle to start if timing control is poor.

Rattling noise

A timing chain, tensioner or VVT issue may cause rattling, especially on cold start.

Reduced power

The car may feel sluggish, flat or hesitant because valve timing is not where it should be.

Poor fuel economy

Incorrect valve timing can reduce engine efficiency and increase fuel use.

Common causes

What causes a P0011 fault code?

P0011 is commonly caused by oil control problems, VVT faults, sensor issues or mechanical timing problems.

Very common

Low engine oil level

Low oil can prevent the VVT system from controlling camshaft timing correctly.

Common

Dirty or old oil

Sludge or contaminated oil can block small VVT oil passages and solenoid filters.

Service issue

Incorrect oil grade

Using the wrong oil can affect oil pressure and VVT response, especially on modern engines.

VVT fault

Faulty VVT solenoid

The oil control solenoid may stick, block, fail electrically or respond too slowly.

Oil flow

Blocked oil galleries

Restricted oil flow can stop the camshaft actuator moving correctly.

Sensor

Camshaft position sensor fault

A poor camshaft signal can confuse the ECU about the real timing position.

Wiring

Wiring or connector issue

Damaged wiring to the VVT solenoid or cam sensor can trigger timing-related codes.

Mechanical

Timing chain stretch

A stretched chain or weak tensioner can make actual cam timing differ from expected timing.

Previous work

Incorrect mechanical timing

If timing work has been done recently, the chain or belt may not be set correctly.

Diagnosis

How a garage should diagnose P0011

✅ Scan all stored, pending and permanent codes.

✅ Record freeze frame data before clearing anything.

✅ Check engine oil level and oil condition first.

✅ Confirm the correct oil grade has been used.

✅ Inspect for sludge, poor servicing history or blocked oil control filters.

✅ Test the VVT oil control solenoid electrically and mechanically.

✅ Check camshaft and crankshaft sensor live data.

✅ Inspect wiring and connectors for oil contamination, corrosion or damage.

✅ Check timing chain stretch or mechanical timing if symptoms point that way.

Avoid this mistake

Do not ignore oil condition

P0011 is one of those codes where the oil really matters. Dirty oil, low oil or the wrong oil grade can cause timing control faults without the cam sensor or timing chain being the first problem.

If the engine is rattling, has poor service history, or the oil is very dirty, the diagnosis should go deeper before fitting sensors. A timing chain problem can become serious if left too long.

UK repair cost guide

How much does P0011 cost to fix in the UK?

Costs vary by vehicle, engine layout, oil system condition, labour rate and whether the fault is electrical, oil-related or mechanical. These are rough UK guide prices only.

Diagnostic scan and checks

Usually around £40–£120 depending on how much live data and testing is included.

Oil and filter service

May help if the issue is dirty oil or wrong oil grade, but it will not fix a mechanical timing fault.

VVT solenoid cleaning or replacement

Cost depends on access, part quality and whether the solenoid is separate or built into another assembly.

Camshaft sensor replacement

May be moderate cost, but should be tested before replacement.

Wiring or connector repair

Can be simple or time-consuming depending on access and where the break or corrosion is found.

Timing chain repair

Can be expensive because of labour time, parts, timing tools and engine access.

Safe driving advice

Can you drive with a P0011 code?

If the engine warning light is steady and the car drives normally, short careful driving may be possible. However, P0011 should not be ignored because camshaft timing faults can affect engine performance, emissions and reliability. If there is rattling, rough running, stalling, oil pressure warning or poor starting, avoid driving and get it checked.

✅ Lower risk: steady engine light, no rattling, correct oil level, normal running and no loss of power.

⚠️ Medium risk: rough idle, poor starting, poor fuel economy, hesitation or repeated engine light.

🚫 High risk: timing chain rattle, oil pressure warning, stalling, severe rough running, smoke or major power loss.

Real experience

What I would check first

On a real car with P0011, I would start with the basics: oil level, oil condition and service history. If the oil is low, very dirty or the wrong grade, that can affect the VVT system straight away.

After that, I would check the VVT solenoid, wiring and live cam timing data. If the engine rattles on start-up or has poor service history, I would be more suspicious of timing chain stretch or tensioner issues.

MOT implications

Will P0011 fail an MOT?

P0011 can lead to an MOT failure if the vehicle has an emissions-related engine warning light, fails emissions, runs badly, smokes excessively or shows obvious engine problems during the test. The MOT does not simply fail a car because a scanner shows P0011, but the fault behind the code can affect the test result.

Emissions failure

Incorrect cam timing can affect combustion and exhaust readings.

Warning light issue

An engine warning light linked to emissions should be investigated before MOT.

Running fault

Rough running, stalling or smoke should be repaired before the vehicle is tested.

Engine light MOT guide Common MOT failures
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Frequently asked questions

Frequently Asked Questions About P0011

Find answers to common questions about P0011 camshaft timing faults, driving safety, repair costs and MOT implications.

What does P0011 mean?

P0011 means the engine computer has detected that the camshaft timing on bank 1 is more advanced than expected. It is commonly linked to variable valve timing, oil flow, VVT solenoids, camshaft sensors or timing chain issues.

Can I drive with a P0011 code?

You should be careful. If the car runs normally and the engine light is steady, short careful driving may be possible. If there is rattling, poor starting, rough running, oil pressure warning, stalling or loss of power, avoid driving and get it checked.

Will P0011 fail an MOT?

P0011 can lead to an MOT failure if it causes an emissions-related engine warning light, poor emissions, rough running, excessive smoke or obvious engine problems during the test.

What causes a P0011 code?

Common causes include low oil level, dirty oil, incorrect oil grade, faulty VVT solenoid, blocked oil galleries, camshaft sensor faults, wiring issues, timing chain stretch or incorrect mechanical timing.

How much does P0011 cost to fix in the UK?

Basic oil and diagnostic checks may be moderate cost, while VVT solenoid replacement can cost more depending on access. Timing chain or mechanical timing repairs can be expensive and should be confirmed with proper diagnosis.

Should I clear a P0011 code?

Record the code, freeze frame data and oil condition before clearing it. Clearing P0011 without diagnosis can hide useful evidence and the fault may return if the timing or oil control problem remains.

About this guide

Based on practical mechanic-style diagnostic experience

Motor Vehicle Expert publishes practical UK vehicle guidance based on real-world mechanical knowledge and hands-on diagnostic experience. This P0011 guide is written to help drivers understand camshaft timing and variable valve timing faults before replacing expensive parts.

Fault codes should always be treated as a starting point for diagnosis. If your car has timing chain rattle, an oil pressure warning, severe rough running, stalling, smoke or major power loss, stop driving and get professional help.