Severity: ModerateToyota

P2440 on Toyota Vehicles

The valve that should seal the air pump off from the bank 1 exhaust stays open, letting hot exhaust back up. P2440 →

85Complaints mentioning the code

#1Rank among 3 brands

9.0%Share of Toyota DTC complaints

In NHTSA owner complaints we analyzed for Toyota, P2440 was mentioned 85 times.

Notes by brand

Toyota Tundra, Sequoia and Land Cruiser V8s and related Lexus models are widely known for AIR valve and pump failures that set P2440 and related codes, often with VSC/TRAC lights and reduced power. Ask a Toyota dealer whether any warranty extension still applies to your VIN before paying for the repair.

Most mentioned models

Toyota Tacoma		57
Toyota Tundra		22
Toyota Sequoia		3
Toyota 4runner		2
Toyota Sienna		1

Model years mentioned

2006: 1 · 2007: 15 · 2008: 4 · 2011: 3 · 2012: 59 · 2013: 1 · 2014: 1 · 2015: 1

Components named in these complaints

Engine (56)
Fuel/propulsion System (17)
Unknown Or Other (14)
Vehicle Speed Control (9)
Electronic Stability Control (esc) (8)

Reports with a crash: 0 · fire: 0 · injuries: 2

Often appears together with

P2442 Powertrain The bank 2 secondary air valve on a V engine doesn't seal, so exhaust pulses reach the air pump… Moderate P2441 Powertrain The air pump runs after a cold start, but the bank 1 valve won't open – no fresh air reaches… Low

Possible causes

Bank 1 switching or combination valve corroded or stuck open by condensation38%
Carbon or debris holding the valve seat off its seal16%
Control side stuck on – vacuum solenoid leaking vacuum or electric valve driver not switching off13%
AIR pressure sensor or its wiring giving a false reading12%

P2440: Diagnosis step by step →

Related codes

Toyota Emission Controls Check engine light on Limp mode Loss of power

Source: NHTSA Complaints API (US government open data), analyzed by DTC mention.