VVT actuator 'A' over-advanced (Bank 1) on Vauxhall — usually the cam phaser or solenoid on the 1.4/1.6/1.8 ecotec engines.
Vauxhall P0011 — VVT actuator 'A' over-advanced (Bank 1) on Vauxhall — usually the cam phaser or solenoid on the 1.4/1.6/1.8 ecotec engines. Typical UK independent garage cost: £180–£1200.
What actually causes P0011 on a Vauxhall
On the 1.8 Z18XER P0011 is almost always the inlet cam phaser failing internally, with a distinctive cold-start rattle for the first 2–3 seconds. On 1.4 Turbo the timing chain is the underlying issue — the chain stretches, throws timing off, and the VVT can't compensate. Always check timing chain wear on these.
Vauxhall engines that log P0011
- 1.4 Turbo (Astra J, Corsa E, Mokka)
- 1.6 Ti / Turbo (Astra J, Insignia)
- 1.8 Z18XER (Astra H, Vectra C, Zafira B)
How we diagnose P0011 on a Vauxhall
- Check engine oil level and condition — low/dirty oil starves the VVT mechanism
- On 1.4 Turbo, perform a timing chain wear check (or measure crank-to-cam angle on scan tool)
- On 1.8 Z18XER, listen for the cold-start cam phaser rattle
- Test VVT solenoid resistance and operation before condemning the phaser
The common misdiagnosis to avoid
Replacing the VVT solenoid alone on a 1.4 Turbo with a stretched timing chain is a temporary fix — the code returns within 2,000 miles when chain wear puts the cam back out of phase.
Vauxhall P0011 repair cost in the UK
Expect £180–£1200 including parts and labour at an independent garage. Main-dealer quotes on Vauxhall are usually higher for the same job, and the spread exists because the cheap cause and the expensive cause throw the same code — pay for the diagnosis before you pay for parts.
Bob's workshop tip
If you've got a 1.4 Turbo with P0011 and 70,000+ miles, plan for a timing chain kit now (£550–£900 fitted) — it will fail eventually and a snapped chain on these is a £2,500 head rebuild.
Codes usually seen alongside P0011 on Vauxhall
- P0014
- P0016
- P0341
Symptoms drivers report with P0011
- Engine rattles like a 'bag of nails' for 3 seconds on a cold start.
- The car felt fine on the motorway, but now it stalls every time I stop at a roundabout.
- Noticeable 'flat spot' or hesitation when trying to overtake in 3rd gear.
- Lumpy, hunting idle that makes the gearstick vibrate.
- Fuel economy has tanked—getting about 10mpg less than usual.
Repairs that clear P0011
- Engine flush and oil change
- Replace VVT solenoid
- Replace cam phaser if needed
For the generic, all-makes explanation of this code — meaning, every known cause and UK cost bands — see our P0011 guide.