Secondary air injection on Audi — 2.0 TFSI and 1.4 TSI combi-valve and pump failures.
Audi P0410 — Secondary air injection on Audi — 2.0 TFSI and 1.4 TSI combi-valve and pump failures. Typical UK independent garage cost: £180–£950.
What actually causes P0410 on a Audi
On Audi 2.0 TFSI, the SAI combi-valve sticks closed from carbon in the air ports — the pump itself is often fine. On 1.4 TSI, the pump motor seizes after years of moisture ingress. VCDS readiness for SAI never sets until P0410 clears, so MOT emissions can pass while readiness fails — a real headache for some test stations.
Audi engines that log P0410
- 2.0 TFSI EA113/EA888
- 1.4 TSI EA111
- 1.8 TFSI EA888
How we diagnose P0410 on a Audi
- VCDS: actuate SAI pump and log current draw, watch combi-valve operation
- Remove combi-valve and check for free movement
- Clean carbon from cylinder head air ports
- Pressure-test air rail from pump to head
- Replace pump only after confirming free combi-valve and clear ports
The common misdiagnosis to avoid
Don't replace an Audi SAI pump before bench-testing the combi-valve — on TFSI it's the valve, not the pump, four times out of five.
Audi P0410 repair cost in the UK
Expect £180–£950 including parts and labour at an independent garage. Main-dealer quotes on Audi 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
TFSI P0410 + SAI readiness fail is a £180 combi-valve and an hour's labour on most jobs — main dealers will quote £900 for the whole assembly.
Codes usually seen alongside P0410 on Audi
- P2440
- P2442
- 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.