2007–2010 Toyota Tundra: Check engine light and limp mode (secondary air injection pump)
Likely causes, ranked
- Air pump or air switching valves damaged by moistureShop
- Fuses, relays or hosesDIY
Real-owner fix counts will appear here as reports come in.
DIY or shop: See DIY or shop section
Parts to check
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Symptom: A check-engine light, often with P2440–P2445, sometimes with the truck going into reduced power after a cold start.
Likely causes
- Air pump and switching valves. Moisture gets into the cold-start air injection system. Toyota's ZTQ program covered pumps and valves, and owners on TundraTalk and Tundras.com discuss coverage and repairs.
DIY or shop?
Parts are accessible on the truck, so DIY is possible. Many owners use a shop.
Useful steps
- Read the codes.
- Ask Toyota about any remaining coverage.
- Check the fuses and relays first.
Vehicle focus: 2007–2010 Toyota Tundra.
Safety / mechanic note
Limp mode can be dangerous in traffic. Verify with a mechanic.
Related trouble codes
- P2440
- P2442
Recalls & service bulletins
Technical service bulletins
- ZTQ Toyota customer support program covering 2007–2010 Tundra and 2008–2010 Sequoia air injection pumps and switching valves (10 years/150,000 miles from first use; now expired for most trucks). Details
NHTSA complaints: 95 keyword-matched complaints (of 915 unique complaints filed under NHTSA model names TUNDRA, TUNDRA CREW CAB, TUNDRA DOUBLE CAB, TUNDRA REGULAR CAB, 2007–2010; NHTSA complaints API by model year, queried 2026-10-15).
Always check your VIN for open recalls at nhtsa.gov/recalls.
Sources
What actually fixed it?
Had this problem? Tell other owners what the real fix was. Reports are counted above; we never show made-up numbers.