The Lemon IndexThe valve that lets cold-start air into the bank 1 exhaust is stuck open. Full P2440 page
21 owner complaints · the #1 code Toyota Tundra owners name · 23% of Toyota Tundra complaints that name a code (every car: 0.6%)
Middle of 81,000 miles · most between 60,000 and 95,000 (21 owners gave it)
Toyota Tundra owners named P2440 in 21 complaints to the U.S. government (NHTSA), most often on the 2007, 2012 and 2008 model years, at a middle of 81,000 miles. The part they name most is the secondary air pump or valve (10 complaints). Complaints are owner reports, not proof of a defect.
Toyota Tundra model years that report P2440
Owner complaints naming P2440, by model year. Raw counts: years that sold more get more complaints, so this is each model year's record, not a failure rate.
Mileage when it happened
81,000 miles is the middle of what 21 owners entered. Half were between 60,000 and 95,000 miles.
The mileage on the complaint form, when the owner gave one.
What owners say caused it or fixed it
The most-named part is the secondary air pump or valve, in 10 of the 21 complaints (48%). 3 of those mention it being replaced or repaired, and 2 say the problem came back afterwards.
- Secondary air pump or valve10 complaints3 mention a repair or replacement, 2 of them say the problem came back
3 complaints mention a recall and 7 mention a warranty.
Counted from the owners' own words: a part counts when a sentence names it with a cause or repair word. What owners wrote, not a diagnosis. A shop should confirm the cause before replacing parts.
Symptoms owners describe with P2440
48% of these complaints say the check engine light came on.
- Loses power or goes into limp mode38%8 of 21 complaints
- Warning lights and electrical faults19%4 of 21 complaints
- Transmission slips or shifts hard14%3 of 21 complaints
Share of the complaints naming P2440 whose text also describes each problem. A complaint can describe more than one.
Codes owners report with it
P2441 4
Other codes named in the same Toyota Tundra complaints, and in how many.
Keep going
- P2440: meaning, causes and every car that reports it
- Toyota Tundra reliability by year
- 2007 Toyota Tundra problems and recalls
Other codes Toyota Tundra owners report
P2440 on other cars
Toyota Tacoma (57)
The details
How we count
We read every owner complaint in the NHTSA file whose text names this trouble code, and count the ones filed about this model (matched by the make, model and model year on the complaint). Mileage is what the owner entered on the form.
Parts: a complaint counts for a part when one of the owner's own sentences names that part together with a cause word (failed, bad, diagnosed, caused by, leaking ...) or a repair word (replaced, repaired, new, reprogrammed ...). "Came back" means the same complaint also says the problem returned or the repair didn't fix it. These are counts of what owners wrote, not a diagnosis, and one complaint can name several parts.
Complaints are reports, not proof of a defect, and most owners never file one. Popular models get more complaints, so the counts are not a failure rate. The code meaning is the standard SAE J2012 definition in our own words, or the carmaker's meaning where we verified it for that make.
What P2440 means
The valve that lets cold-start air into the bank 1 exhaust is stuck open. Exhaust moisture can then reach and damage the air pump.
Drive on, get it checked. You can usually keep driving. Have the code read at your next service or within a few weeks.
- Failed switching (check) valve
- Failed air pump
- Water or carbon in the valve
Check the complaints yourself
NHTSA complaint numbers (search them at nhtsa.gov): 11324417, 11268636, 11128204, 11072058, 10947402, 10875492, 10763740, 10744429, 10704399, 10681574, 10505637, 10492960 and 9 more.
Quick answers
What does P2440 mean on a Toyota Tundra?
Secondary Air Injection System Switching Valve Stuck Open (Bank 1). The valve that lets cold-start air into the bank 1 exhaust is stuck open. Exhaust moisture can then reach and damage the air pump.
Which Toyota Tundra years have the most P2440 complaints?
In complaints to NHTSA, owners of the 2007 (13), 2012 (3), 2008 (3) Toyota Tundra named P2440 most (21 complaints in all, 2007–2012). Raw counts, not a failure rate.
What fixes P2440 on a Toyota Tundra?
Owners most often name the secondary air pump or valve (10 of 21 complaints). That's what owners wrote, not a diagnosis: have a shop confirm the cause with a scan and tests before replacing parts.
At what mileage does P2440 show up on a Toyota Tundra?
Owners who gave their mileage reported a middle of 81,000 miles; half were between 60,000 and 95,000 (21 owners).
Can I drive my Toyota Tundra with P2440?
Drive on, get it checked. You can usually keep driving. Have the code read at your next service or within a few weeks.
Sources: NHTSA owner complaints that name P2440 on the Toyota Tundra, counted by The Lemon Index; NHTSA recalls; repair bills owners named. Meanings: SAE J2012 in our own words. Owner reports, not a diagnosis or repair advice for your car.