Secondary air injection malfunction on Vauxhall — Z18XER/A18XER SAI pump and check valve seizure.
Vauxhall P0410 — Secondary air injection malfunction on Vauxhall — Z18XER/A18XER SAI pump and check valve seizure. Typical UK independent garage cost: £140–£480.
What actually causes P0410 on a Vauxhall
Vauxhall P0410 — SAI pump seized from rust (UK damp climate) or check valve failure. Common on 60k+ Astras.
Vauxhall engines that log P0410
- 1.8 Z18XER/A18XER (Astra/Zafira)
- 1.6 Z16XER
How we diagnose P0410 on a Vauxhall
- Activate SAI pump via Tech2
- Check pump current draw
- Inspect check valve
- Replace pump and valve as set
The common misdiagnosis to avoid
SAI delete kits are MOT-compliant only on pre-emissions cars — modern Astras need a working SAI for MOT.
Vauxhall P0410 repair cost in the UK
Expect £140–£480 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
Astra Z18XER P0410 — pump + valve together. Don't half-fix.
Codes usually seen alongside P0410 on Vauxhall
- P0411
- P0412
Symptoms drivers report with P0410
- A loud 'vacuum cleaner' or 'jet engine' noise from under the bonnet for the first 60 seconds after a cold start.
- A sudden drop in revs or a slight stumble just as the air pump shuts off.
- Engine management light (EML) glowing amber, often appearing a minute after driving off from cold.
- A strange 'mooing' or clicking sound when the engine is idling during warm-up.
- The car failing its MOT on the 'Major' defect of having an active EML, even if the emissions are actually okay.
Repairs that clear P0410
- Replace air pump
- Clear or replace hoses
- Replace check valve
For the generic, all-makes explanation of this code — meaning, every known cause and UK cost bands — see our P0410 guide.