Fault codes P2440 and P2442, powertrain - auxiliary emission controls. Air pump failing at 41,000 miles. Dealer repair cost is $1,900. Vehicle goes in to "limp mode" when started, that drastically reduces power.

- Santa Barbara, CA, USA

While commuting to work the engine light and traction control light came on, causing my truck to slow down, very slow. It would not let me accelerate and disabled my progress to around 2000 rpms. This could have been a very serious or a dangerous situation especially if I was towing a load or in a major traffic situation. Codes - 2440 and 2442 were the causes of this scary account.

- Bennettsville, SC, USA

Secondary air injection switching valve malfunction related to emissions. Code P2440 & P2442,

- Stevensville, MI, USA

At start up "check engine" and "trac off" lights were on. Truck had no acceleration and transmission would not shift. I took the car to the dealership and diagnostic codes P2440 and P2442 were detected. Dealer had to replace the air injection system bank 1 and bank 2. during research, I discovered numerous other owners of 2012 Tacoma's complaing about the same issue. Some even lost power while driving. Also, the Tundra apparently had a similar issue being reported

- Fair Lawn, NJ, USA

The contact owns a 2012 Toyota Tacoma. After starting the vehicle, the check engine, traction control, and maintinence indicators remained illuminated. While driving, the vehicle would not accelerate past 25 mph. The vehicle was taken to autonation Toyota in houston, Texas where it was diagnosed that the engine air pump and air valve were faulty and needed to be replaced. The vehicle was repaired. The manufacturer was not notified of the failure. The failure mileage was 45,000.

- Houston, TX, USA

The contact owns a 2012 Toyota Tacoma. While driving 62 mph, the check engine indicator illuminated and the vehicle began to lose power. The contact stated that the vehicle experienced a limp home setting. The contact stated that he was aes certified. The contact stated that the tow hitch was in use when the failure occurred. The vehicle was taken to a local dealer (fiore Toyota Volkswagen 1000 S. logan blvd, holidaysburg, pa 16648) where it was diagnosed that the secondary air injection switching valve failed and needed to be replaced. The vehicle was repaired by the contact. The manufacturer was notified of the failure, but did not offer any assistance. The failure mileage was approximately 88,000.

- Imler, PA, USA

I was leaving work and pulling onto the highway when I noticed my check engine light came on, as well as the trac off light. I went to pull into traffic and immediately realized that whatever was wrong put my truck into limp mode and had a 2500 RPM limit. This was a 60 mph highway and I couldn't go more than 35 mph. The traffic coming was immediately upon me and I had to pull over and put on my hazard lights as these vehicles had to slam on their brakes, honk, and swerve around me. I brought it into the dealership and they read code P2442. Which is for a stuck secondary air injection valve. They found water in the valves and they had to be replaced. Doing some research I found this is a very common issue in 2nd gen Tacoma, mostly the 2012. This a very well known issue, especially to Toyota, and they have so far done nothing about it. This led to a very dangerous near crash incident which I then had to pay over 1200 dollars to fix. This is completely unacceptable. Toyota must at least take ownership of their poorly designed parts and cover the replacement of these valves and pumps. This is happening all over the country on a consistent and persistent basis. Please make Toyota address this, their customers deserve so much better.

- Mukilteo, WA, USA

Secondary air injection system (P2442). This hardware defect has been a recall for Tundra but not for Tacoma. The part is defective on most 2012 Tacoma and very expensive to replace. There are safety issue as the vehicle unable to accelerate, but only able to limp. There are many discussions about this issue but Toyota has not done anything about this.

- Marrero, LA, USA

Vehicle was in motion on rainy, wet highway when check engine light went on and traction control was shut off. The secondary air injection switching valve is apparently stuck closed, which for some reason shuts off the traction control. It is my understanding from speaking with other Tacoma and Tundra owners that had the valves gotten stuck open, the vehicle goes into "limp mode" which automatically decreases speed to 20mph. Obviously, either of these occurrences are particularly unsafe in rainy and wet conditions, and the decrease in speed is unsafe during any highway traveling. This is apparently a big enough issue on the Tundra models for Toyota to extend the warranty to 150,000mi, yet they have done nothing for the Tacoma which have an identical system and parts.

- Matawan, NJ, USA

Failure of the secondary air injection pump and valve emission system prompted engine to run in a reduced power mode, and this occurred on a on a relatively new vehicle with below average mileage. While setting may protect engine, this created an unsafe driving environment for vehicle within fast moving traffic. My compliant is not related to the reduced driving mode that may have protected the engine, but rather the poor design of the air-pump/valve system that prematurely failed causing the reduced power mode.

- Kansas City, MO, USA

My truck's check engine light and trac off light came on and I took it to my local repair shop. The manager told me that after the level 1 diagnostic, a P2442 error code appeared (switching valve stuck). The valves, and air pump are part of the secondary air injection system which diverts some exhaust back into the engine to reduce emissions output. As part of the truck's emergency system, the truck limited the engine operation parameters to about 2000rpm, and about 40mph maximum. Express oil change and tire engineers quoted the parts at around $1500, not including labor. The day of diagnosis, the truck had 72,952 miles and was purchased Nov. 2011. Currently unable to safely drive my truck in normal traffic. Facing a nearly $2K bill, I decided to do some digging into emissions warranty information and found that those parts were not going to be covered by the 8yr/80,000 mile federal emission control warranty as outlined in my warranty and maintenance guide, even though these are a critical part of the system. While online, I read several posts on tacomaworld.com where several others were having the same issues. What was more concerning was that this very same issue was very common in Toyota Tundra not long ago and the manufacturer extended their warranties to cover the costs because it would appear to be a manufacturer defect. Now, the very same thing is happening with Tacoma but the extended warranty has not been extended to my truck. The service lights have since come back on and the truck is not drivable, I have yet to get a hold of Toyota but because of the holiday, I will have to wait until the morning but not expecting much. Who will pay for my rental car while I'm paying this bill? https://www.tacomaworld.com/threads/secondary-air-injection-system-P2440-and-P2442.370792/ www.tundraheadquarters.com/blog/Toyota-warranties-air-injection-pump/

- North Chesterfield, VA, USA

As I went from side road to main road, truck would not accelerate to full speed even with foot on the pedal, indicators trac off and check engine were lit. Went to mechanic and error codes P2440 and P2442 indicated malfunction in secondary air injection system. Was told new air pump and diverter valve required at cost of $2K. Truck has less than 30K on it, but is 5 years old. Going into limp mode is dangerous as the main street is 55mph. Toyota states Tundra have same issue that is now covered by 10 year/150K warranty, but nothing for Tacoma owners. So I am quite angry with that as well. Have read online that many other owners are having same issues. Toyota should recall these defective pumps and valves in addition to disabling the limp mode as it is very dangerous.

- Grand Rapids, MI, USA

Secondary air injection valve quit working and put my truck into a 'limp mode.' During this time my speed was cut no more than 40 M.P.H. I was merging onto the highway at the time and it created a very unsafe condition. I started researching the issue and saw a ton of other people had the exact same issue. I'm sure Toyota knew about it as well, because the mechanic at the dealership did. Why didn't they put out an alert or recall??

- Saint Louis, MO, USA

2012 Toyota Tacoma. The vehicle has codes P2440, P2441, P2442 relating to the secondary air injection system (sais) valves being stuck open/closed. This appears to be a common problem with 2012 Tacoma vehicles and several years for Tundra vehicles. For the Tundra, Toyota instituted a customer support program and extended the warranty coverage for the sais. With the vehicle having only 47,391 miles, it is outrageous that the sais would have issues or failures especially being a Toyota. Since the truck is in limp mode and not safe to drive, it will have to be towed to a dealership. Between this issue and a noise and pulling periodically from the front differential/drivetrain, we are very disappointed in this vehicle.

- Lebanon, TN, USA

2012 Tacoma with 24K miles. Check engine light and trc light came on with truck in limp mode when I started it to go to work. Codes P0412 P2433 P2438 P2442. Toyota wont cover this and its a defect in many many 2012 Tacoma.

- Santee, CA, USA

My 2012 Toyota Tacoma first started throwing a P2442 error code and I had a mechanic clear it twice. Now it is throwing a P2440 and P2442 error code. This is the secondary air injection system valve assembly. Both bank 1 and bank 2 valves are stuck open. I called Toyota corporate (1-800-331-4331) and filed a complaint after seeing all of the other 2012's with the same problem. They just want me to get it to a Toyota dealership to read the code and then go from there. Unfortunately I don't live near a dealership and they want to charge me for a diagnostic test that my local mechanic just performed. The truck is in limp mode with the check engine and trac off lights illuminated.

- Bridgeport, WA, USA

Emissions air pump valve went out with 60,200 miles on the truck. The truck is bone stock and has been very well maintained. After research its seems that numerous people are having issues with this same exact part on the 2012 Tacoma. Toyota extended a recall on the Tundra's because of this part, but not the Tacoma. The truck is currently in limp mode and will not go past 40mph, and the dealer wants $1,075 to fix it. This occurred on my way to work this morning while getting on the freeway, and was quite scary to not be able to go over 40mph on a bay area freeway with cars honking and flying past me.

- Pleasanton, CA, USA

Cel and trac off lights came on and truck went into limp mode. I was only able to drive 25-35mph in limp mode. Took 2012 Toyota Tacoma to local mechanic and the trouble code was P2442, secondary air injection system bank 2 valve stuck open. Contacted Toyota dealer but no help even though Toyota corporate is aware of the problem on 2012 Toyota Tacoma as well as other models.

- Bridgeport, WA, USA

Bought truck new in 2012 and maintained 100% recommended maintenance at dealer. At 64,500 mileage, check engine light came on while driving, and we drove truck straight to dealer service garage. Dealer determined secondary air injection pump had contaminated with water, resulting in rust in system (valves also). Replaced pump and valve assembly and gasket. Service advisor said the same parts were used and recalled in response to reports of air induction pump assemblies and/or air injection switching valves issues on their 2007-2010 Tundra and 2008-2010 sequoia models, Toyota has decided to increase its warranty on these parts and is even offering a reimbursement if you already had this issue fixed. Tacoma's need to be included in the recall reimbursement! when we asked about how to prevent future issues, service tech informed us the part has been "re-designed" to prevent the problem from re-occurring. Total bill from dealer was $1968.29. This vehicle has never been off road, never been in flood conditions, and is a commuter vehicle on paved roads.

- Lumber Bridge, NC, USA

Secondary air injection valve stuck open causing truck to enter "limp-mode" while commuting on congested freeway system. This presented a safety hazard to myself and my family trying to merge off the freeway through traffic without any power.

- Boise, ID, USA