Vauxhall P0341

Camshaft position sensor 'A' range/performance on Vauxhall — sensor failures on Z16/A16 petrol, chain stretch on 1.4T.

Vauxhall P0341 — Camshaft position sensor 'A' range/performance on Vauxhall — sensor failures on Z16/A16 petrol, chain stretch on 1.4T. Typical UK independent garage cost: £50–£2400.

What actually causes P0341 on a Vauxhall

Vauxhall A14NET 1.4 turbo engines suffer well-known timing chain stretch — P0341 often stores alongside P0016 as the first symptom, well before catastrophic failure. On 1.6 petrol (Z16XER/A16XER) it's usually a genuine sensor failure (£40 fix). On CDTi diesels, sensor wiring is the common cause.

Vauxhall engines that log P0341

• 1.4 Turbo A14NET (Astra J, Insignia, Corsa)
• 1.6 Z16XER / A16XER (Astra H/J)
• 1.7 CDTi (Astra, Zafira)
• 2.0 CDTi (Insignia)

How we diagnose P0341 on a Vauxhall

1. On A14NET, listen for chain rattle — well-known fault, often paired with P0341/P0016
2. TECH2/GDS2: read cam timing deviation
3. Test cam sensor signal and inspect harness
4. On 1.6 petrol, check oil level and condition — sludge kills sensors slowly
5. Replace sensor as a last step on A14NET — never first

The common misdiagnosis to avoid

Don't fit a £40 sensor to a 1.4 Turbo Astra with chain rattle — the chain replacement is £1,800+ and ignoring it leads to a bent valve job.

Vauxhall P0341 repair cost in the UK

Expect £50–£2400 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

Vauxhall A14NET chain failures are so common that buying a used Astra/Corsa with one without proof of chain replacement is a risk — budget £1,800 immediately if no history.

Codes usually seen alongside P0341 on Vauxhall

• P0016
• P0017
• P0340

Symptoms drivers report with P0341

• Engine cranks noticeably longer than usual before catching — especially hot restarts after a shop stop
• Loud metallic rattle for the first 2–4 seconds of a cold start (the classic 'death rattle')
• Rough lumpy idle at traffic lights, sometimes stalls when you dip the clutch
• Turbo feels lazy or flat below 2,000 RPM — ECU has retarded timing to protect the valvetrain
• Stop/Start stops working (ECU disables it once cam adaptation drifts past spec)
• MPG drops 3–6 mpg with no other obvious cause
• P0011 / P0014 / P0016 / P0335 often stored alongside — that combination is chain, not sensor

Repairs that clear P0341

• Sensor replacement
• Timing chain inspection

For the generic, all-makes explanation of this code — meaning, every known cause and UK cost bands — see our P0341 guide.