Secondary air injection malfunction on Toyota — 4.7 V8 (Land Cruiser) SAI pump and switching valve.
Toyota P0410 — Secondary air injection malfunction on Toyota — 4.7 V8 (Land Cruiser) SAI pump and switching valve. Typical UK independent garage cost: £240–£1400.
What actually causes P0410 on a Toyota
Toyota P0410 is rare in UK but appears on imported Land Cruisers and Lexus LX470. Pump corrosion from UK damp climate is the killer.
Toyota engines that log P0410
- 4.7 V8 2UZ-FE (Land Cruiser/Lexus LX470)
- 5.7 V8 3UR-FE (Tundra import)
How we diagnose P0410 on a Toyota
- Activate SAI via Techstream
- Pump current draw
- Switching valve test
- Pierburg or OEM pump
The common misdiagnosis to avoid
Toyota OEM SAI pumps are expensive but pattern parts have very short lifespans.
Toyota P0410 repair cost in the UK
Expect £240–£1400 including parts and labour at an independent garage. Main-dealer quotes on Toyota 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
Land Cruiser 4.7 P0410 — Pierburg pump, OEM switching valve. Done right, done once.
Codes usually seen alongside P0410 on Toyota
- 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.