4.0L V6, dcsb, at, or package, 4X4, 41.5K miles, cel on, tcl on, limp mode on, codes P2440 P2442. References a secondary air pump valve issue. Truck was started in the morning, reversed out of driveway, cel, tcl, and limp mode activated when put into drive. Unable to reach safe operating speeds due to limp mode. Veh was on city street when codes triggered limp mode. Failure of poorly designed valves and system causes valves to remain stuck open allowing a larger than normal volume of exhaust fumes to recirculate to the intake through all operating ranges instead of just engine start up. Potential for engine failure and fire.

- Lake Forest, CA, USA

While driving on a city street the check engine light and trac off light illuminated and truck would not go over 25 mph. Brought directly to mechanic that found diagnostic trouble code P2442 - secondary air injection system malfunction. At 61K miles this faulty part was not covered under any warranty. The part cost alone was $1321 and then add tax and labor for a total of $1709! so disgusted with Toyota for not taking accountability for this faulty product.

- Martinez, CA, USA

Secondary air pump and valve failure. Second time in 1 year.

- Frisco, TX, USA

As I read through the complaints on here, it seems most are for the same issue I have seen. As it is the biggest complaint item for 2012 Tacoma on this website, and the fact that there is a recall on Tundra for the same item, and that 2013 Tacoma were redesigned to fix, this is clearly a known issue of a faulty part/design of the the air injection pump valve. It is unacceptable that nothing is done about this and the danger it poses. Like the others, I got a check engine light/trac off one evening when I started my truck. My truck started up fine, and I didn't notice a problem until I tried to merge onto a 60 mph road. I tried to accelerate and merge but I almost caused a pile up as I could not accelerate beyond 35 mph. Luckily, all I got was a bunch of honking. This is a very dangerous situation! after further research, I saw the codes P2440 and P2442 and understand it is a limp mode due to an emmisions item at startup. Before being able to fix, I had to work a shift at my second job of ski patrol in the rocky mountains. As my truck obviously couldn't make it up the canyon, I was forced to borrow another car, and all I could get was a 2 wheel drive. There was a late season storm, and because I didn't have my 4X4 truck I got stuck overnight in the mountains. I survived, but twice because of this issue I was faced into a dangerous situation. I bought a new 4X4 for the very reason to avoid dangers like these. Granted I have 65K miles now, but I don't expect a vehicle to have major problems like this. It is even worse to find out that it is a known issue and no one is doing anything about it. It is a disappointment that with a known issue Toyota has not done something about this for the Tacoma, but I am equally surprised that there are so many complaints and examples of dangerous situations and the NHTSA hasn't done anything either.

- Lehi, UT, USA

Ecl code P2442, secondary air handler, epa part but Toyota dealers won't cover under epa warranty.

- Cibolo, TX, USA

Air valves in emission system went bad, was reduced to driving 35mph in heavy traffic, very unsafe. Was quoted $2500 in repairs for repairs resulting from faulty design. Reports rampant on the internet of this part failing. Tpyota fixed the issue on later model Tacoma and recalled Tundra with the same issue but have ignored this make/model/year.

- Henderson, KY, USA

On the way home from a recent camping trip my check engine light and trac light came on in my truck. The truck went into "limp" mode would not accelerate up a hill above 20 miles per hour. We drove to the nearest auto zone, they pulled the codes P2436 and P2442. I was able to clear the codes and make it home. I started researching this and found the secondary air switching valves to be a common failure on Tacoma and Tundra. I feel this part needs to be recalled and upgraded, this could be a major safety issue if the vehicle went into "limp" mode in heavy traffic or while crossing across heavy traffic. The replacement part 25710-31022 was ordered from the dealership today. I also filed a complaint with Toyota customer service.

- Smackover, AR, USA

Driving home from work on the freeway when the check engine light came on, then the engine started to slow down and would not go above 35 miles/hour on the freeway. Took to dealer and was told secondary air injection switching valve stuck open (bank 1 & 2) requiring replacement.

- Medford, OR, USA

I have a 2012 Toyota Tacoma 4X4 sport double cab longbed with 28860 miles. I started the engine and noticed the "check engine" and "trac control" lights on in the cluster. As I was driving I noticed a lack of power it was in "limped mode". made it to my mechanic who did a code check with reader, codes P2440 and P2442 shown which is secondary injection pump valve malfunction. The concerning aspect is that with such low milage this malfunction occurs that makes the truck go into limp mode which can be dangerous in any give situation on the highways. Toyota must really consider investigating this defect.

- Kaunakakai, HI, USA

Pulled onto the interstate and the truck would no accelerate. Put on my hazards and tried to avoid getting hit. Got off on the next exit. Had to go up a hill to get home and truck was struggling to maintain 20 mph. Took it to the dealer who said it was the air injection valves and that the truck had gone into limp mode because of the emissions problem. Codes were P2440, 2442. Dealer said problem is not covered by powertrain warranty and emissions warranty expired.

- Owens Cross Roads, AL, USA

While driving and turning onto a highway, "check engine"and "trac off" warning lights came on as I pulled into traffic. Truck went into limp mode so I couldn't accelerate. Oncoming traffic worked around me as I turned on my hazard lights. Secondary air injection system P2440 and P2442 are the error codes associated with the valves stuck open.

- Elgin, TX, USA

2012 with only 24,900 miles and my vehicle has the same issue as the Toyota Tundra issue relating to secondary air injection pump. Dealer says it's not covered. The are an awful lot of people with the same problem on their Tacoma's. it's no fair!

- St Simons Island, GA, USA

Code P2442: Secondary air injection system switching valve stuck open bank 2. this happened on a vehicle that does not tow, drive off road, and is in warm weather climate, austin, tx. My commute to work is 5 miles, each way. Toyota says this is not covered under power train or emissions warranty. This is a $2,000 fix for a vehicle with only 59,000 miles.

- Austin, TX, USA

Code P2440 and P2442. Air injection system valves are stuck open (related to emissions control unit) which causes the vehicle to go into 'limp' mode abrupbtly. This renders the vehicle undriveable, and can occur in the midst of driving causing serious danger to the driver and fellow drivers on the road. Toyota is unwilling to cover under any powertrain or emissions warranty. This issue is pervasive among 2012 Tacoma owners and Toyota redesigned the system as early as 2013 which implicates their knowledge of such a defect.

- Santa Rosa, CA, USA

Secondary air injection system failure. If you look in line it is an epidemic with 2012 around 50,000 miles. 2000 $ repair. They don't cover. Lost power at 75 on the highway and almost got killed.

- Kingston, MA, USA

Secondary air injection valve stuck open causing limp mode. Happened near very dangerous intersection and lost all power in truck. As others have stated, truck only has 50K miles and required a $500+ repair (part only) for a component of the emission system which is only used on startup and includes a warranty of only 2 years.

- Wadsworth, OH, USA

The engine check and trac off lights on when I drive on highway. The secondary air injection system failure the dealer checked, it will cost $2000 to fix it, it is only 69K miles and 5 years old vehicle. I could not accelerate the vehicle on highway and it suddenly slow down.

- Columbia, MO, USA

Check engine code- P2442. This has been a common issue with Toyota SUVS, and trucks!

- Escondido, CA, USA

Truck normally starts right up, cranked it over no start. Tried it again and it started, but the "check engine" and the "trac control" lights stayed on. Tried getting on the freeway and had very little power getting on the on-ramp. Put the flashers on to prevent cars exiting the freeway @ 65 mph from crashing into me and my limping Tacoma. They also put their flashers on too. Very unsafe! limped towards home on surface streets....1 hour drive took me 2. scanned the error codes and P2440 and P2442 came up, switches stuck open in the #1 & #2 bank. After spending $1470.54 for parts I made the repairs. Looked @ a co-workers 2008 Tacoma and this bad idea is not on his Tacoma.....hhhhhmmmm. He, S just lucky I guess. Please help.very unsafe design, very expensive remedy

- Benicia, CA, USA

Replacement air injection valves and pumps for secondary emissions control system. Toyota wants 2200 for an issue they are aware of and have already released service bulletins for on the Tundra and sequoias. Engine codes P2442 and P2446. When the codes are thrown the car is put into limp mode and decelerates to 35 mph, even though this is a non-essential emissions system.

- Orlando, FL, USA