The Lemon IndexThe valve that lets cold-start air into the bank 1 exhaust is stuck open. Full P2440 page
57 owner complaints · the #2 code Toyota Tacoma owners name · 47% of Toyota Tacoma complaints that name a code (every car: 0.6%)
Middle of 62,000 miles · most between 47,000 and 87,000 (54 owners gave it)
Toyota Tacoma owners named P2440 in 57 complaints to the U.S. government (NHTSA), most often on the 2012, 2015 and 2013 model years, at a middle of 62,000 miles. The part they name most is the secondary air pump or valve (34 complaints). Complaints are owner reports, not proof of a defect.
Toyota Tacoma 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
62,000 miles is the middle of what 54 owners entered. Half were between 47,000 and 87,000 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 34 of the 57 complaints (60%). 8 of those mention it being replaced or repaired. Next: fuel injectors (4).
- Secondary air pump or valve34 complaints8 mention a repair or replacement
- Fuel injectors4 complaints2 mention a repair or replacement · what owners paid
8 complaints mention a recall and 20 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
51% of these complaints say the check engine light came on.
- Loses power or goes into limp mode58%33 of 57 complaints
- Stalls or shuts off4%2 of 57 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
Other codes named in the same Toyota Tacoma complaints, and in how many.
Recalls on these Toyota Tacoma years
- Engine · 2013 · issued 2013
The engines of the affected vehicles contain valve springs that may break over time. NHTSA 13V557000
1 recall for the same systems (engine) on the Toyota Tacoma model years above. A recall for the same system isn't proof it's behind P2440. Recall work is free at any dealer: check a VIN at nhtsa.gov/recalls or with our VIN check.
Keep going
- P2440: meaning, causes and every car that reports it
- Toyota Tacoma reliability by year
- 2012 Toyota Tacoma problems and recalls
Other codes Toyota Tacoma owners report
P2440 on other cars
Toyota Tundra (21)
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): 11320809, 11292261, 11229834, 11208428, 11205116, 11204350, 11194082, 11190141, 11156453, 11073959, 11063415, 11056546 and 45 more.
Quick answers
What does P2440 mean on a Toyota Tacoma?
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 Tacoma years have the most P2440 complaints?
In complaints to NHTSA, owners of the 2012 (55), 2015 (1), 2013 (1) Toyota Tacoma named P2440 most (57 complaints in all, 2012–2015). Raw counts, not a failure rate.
What fixes P2440 on a Toyota Tacoma?
Owners most often name the secondary air pump or valve (34 of 57 complaints), then fuel injectors. 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 Tacoma?
Owners who gave their mileage reported a middle of 62,000 miles; half were between 47,000 and 87,000 (54 owners).
Can I drive my Toyota Tacoma 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 Tacoma, 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.