Secondary air injection malfunction on Ford — 1.6/2.0/2.5 Duratec SAI pump on Focus/Mondeo (US-spec mainly, but UK imports).
Ford P0410 — Secondary air injection malfunction on Ford — 1.6/2.0/2.5 Duratec SAI pump on Focus/Mondeo (US-spec mainly, but UK imports). Typical UK independent garage cost: £140–£480.
What actually causes P0410 on a Ford
Ford P0410 in UK is normally on imported US-spec petrol cars — UK-market petrols often don't have SAI. Confirm spec before diagnosing.
Ford engines that log P0410
- 2.0 Duratec HE
- 2.5 Duratec V6
- 1.6 Sigma Ti-VCT
How we diagnose P0410 on a Ford
- Confirm SAI fitted on this VIN
- Activate pump via FORScan
- Check pump current draw
- Inspect plumbing for corrosion
The common misdiagnosis to avoid
Don't diagnose P0410 on a UK-market Focus without checking if SAI is even fitted — many aren't.
Ford P0410 repair cost in the UK
Expect £140–£480 including parts and labour at an independent garage. Main-dealer quotes on Ford 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
Ford P0410 — VIN check first. Half these are misdiagnosed on UK cars without SAI.
Codes usually seen alongside P0410 on Ford
- P0411
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.