Huge win for car owners! All TSBs to be made public. The Center for Auto Safety just made the NHTSA (US Government) make public the full text of all TSBs from now on. They are the same organization that has petitioned the NHTSA & filed lawsuits to protect car owners over exploding gas tanks & other major safety issues. Whenever you drive in your car, you are safer thanks in part to a lot of work over the years by this small but very effective consumer advocacy group.

Please take a moment & say thank you by donating $5 or whatever you can to the Center for Auto Safety.


definitely annoying
Crashes / Fires:
0 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
44,086 miles

About These NHTSA Complaints:

This data is from the NHTSA — the US gov't agency tasked with vehicle safety. Complaints are spread across multiple & redundant categories, & are not organized by problem.

So how do you find out what problems are occurring? For this NHTSA complaint data, the only way is to read through the comments below. Any duplicates or errors? It's not us.

2012 Toyota Tacoma engine problems

engine problem

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2012 Toyota Tacoma Owner Comments

problem #19

Sep 062016


  • 57,000 miles


Secondary air injection switching valve failure stuck in open position causing limp mode in the truck. Truck is not able to get to speed above 40 mph. This happened as I was pulling out of my neighborhood onto a state route with speed limit of 55 mph and cars going way faster than that. This could pose a danger if situations where speed it required to get out of the way of another car. Truck only has 57K miles on it. This is a supplemental emissions system and should not cause the truck to be useless if fail.

- Kansas City, MO, USA

problem #18

Aug 302016


  • 57,000 miles
57,000 miles on truck went into limp mode, P2440 and P2442 code showed secondary air injection valve dealer quoted $2000, said they wouldn't cover anything

- Axton, VA, USA

problem #17

Aug 232016


  • 62,300 miles
The secondary air injection pump failed at 62,000 miles. For specifics it showed the codes P2440 and P2442. This was known problem on the previous model Tundra, the service mgr at rodland Toyota said they had already replaced three pumps on trucks of the same year that week.

- Langley, WA, USA

problem #16

Aug 292016


  • 50,890 miles


The secondary injection pump went out.

- Roseburg, OR, USA

problem #15

Nov 052015


  • 23,000 miles
This is a problem with the secondary air injection pump and left me stranded on the roadside...24000 miles on a truck is not even broke in..reliability?..I handled it..only because ive been a mechanic for 25 years...what if it was my wife and kids broke down in getto town...this is a huge problem for many and is so common..ive cleared the codes several times but they always reappear...this is a definate recall...make it so...24000 9N a truck and I cant drive loyalty is fading fast...try to imagine driving your truck down a St.louis 6 lane freeway and your truck says...nope you staying here..on the side of the road...dont get out...youll get ran over...maybe Toyota should have a display on the info center concole that tells you that...and then wishes you good luck...

- Aurora, MO, USA

problem #14

Jul 292016


  • 71,000 miles
I was driving on A50mph highway an check engine light comes on and truck slows to 40mph wont go any faster.

- Deland, FL, USA

problem #13

Jul 192016


  • 45,100 miles


My 2012 Tacoma with 45,000 miles got a check engine light and "trac off" light when I started it to go home. I was merging onto the interstate and unable to go above 40 mph. This was obviously not safe so I exited and took it to a dealer. They cited trouble codes P2440 and P2442 and said they needed to replace secondary air injection valve (pn 25710-31022) for a total cost of $940! according to forums and the site, this is a very common complaint with this year and model. I just bought this last July and I never expected to have to replace parts anytime soon.

- Shueyville, IA, USA

problem #12

Jul 162016


  • 54,640 miles
My 2012 Toyota Tacoma prerunner 2wd has 54,640 miles. I just got a check engine light and "trac off" light yesterday. My truck would accelerate to just 25 mph when merging onto the interstate and top speed was around 50 mph. This is a serious safety issue and Toyota will not cover this known problem under the standard 3 year 36,000 mile warranty. Autozone ran the diagnostic scan and came up with trouble codes P2440 and P2442. These are tied to the secondary air injection system and switching valves. The Toyota dealership said this would cost me close to $2000 to repair. I paid $30,000 for this vehicle brand new just 4 years ago. This needs to become a class action lawsuit so that a safety recall is issued for Toyota to repair this known defect for free.

- Arlington, TN, USA

problem #11

Jun 132016


  • 74,000 miles
Air pump and valves on the emission system failed. Truck went into limp mode with limited acceleration and speed. This is a safety hazard. This is a common problem on 2012 Tacoma. Tundra and sequoia vehicles have had the same exact issue and repairs covered by Toyota. However, Toyota will not cover this same issue on the Tacoma.

- Bedford, VA, USA

problem #10

Jun 212016


  • 65,000 miles
Codes P2440 & P2442 these are for the air injection system on start up. The valves fail and this is a emissions part. Out of warranty and only have 65,000 miles. Tundra had this issue and got a 10 year warranty on the components.

- Santa Fe, TX, USA

problem #9

Jun 202016


  • 56,000 miles


The contact owns a 2012 Toyota Tacoma. After the vehicle was started, the check engine warning light illuminated. The vehicle was taken to a dealer where it was diagnosed that the secondary air injection valve needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure. The approximate failure mileage was 56,000. The VIN was not provided.

- Fallbrook, CA, USA

problem #8

May 092016


  • 34,000 miles
After starting Tacoma, check engine light and "trac off" light came on, went into limp mode, could only go 30mph. Tacoma just hit 34,000 miles. Dealership stated secondary air injection valve stuck closed bank 1 (code P2441). Was told pump and valves needed to be replaced at $2100, including labor. Called Toyota corporate, told it was not covered under power train or emissions warranty. This issue actually first occurred approximately 4 months ago while driving on a city street. Warning light came on and went into limp mode. Pulled into a Firestone and they said it was also code P2441. They reset it and it didn't happen again until a few days ago. This time the code would not reset, warning light won't turn off and remains in limp mode.

- Bellingham, WA, USA

problem #7

Feb 142016


  • miles
Secondary air injection valve failure at 53K miles, Toyota would not cover under my power train or emission warranty. Truck was put into limp mode when the failure happenned and was undrivable.

- Virginia Beach, VA, USA

problem #6

Oct 062015


  • 68,000 miles
The contact owns a 2012 Toyota Tacoma. While driving 55 mph, the vehicle seized and the speed decreased to 20 mph. The vehicle stalled in the middle of the highway. The vehicle was taken to the dealer where it was diagnosed that the air pump needed to be replaced. The vehicle was not repaired. The manufacurer was not notified of th failure. The failure mileage was 68,000. The VIN was not availiable.

- Gibson, GA, USA

problem #5

May 062014


  • 35,600 miles
Engine oil light comes on and flashes a few times after startup, beyond the normal time for all the other lights while in the starting mode, dealer could not duplicate

- Jenkinsburg, GA, USA

problem #4

Jul 012015


  • 500 miles
Vehicle lunges when you come to complete stop, better hold the brake with some force any time stopped, Toyota service says it happens all the time, its normal !!

- Jenkinsburg, GA, USA

problem #3

Aug 202015


  • 50,000 miles
At aproximate 40 mph and at a constant speed the vehicle starts to shutter or shake, feels like it wants to down shift or up shift maybe its confused. Dealer could not duplicate 2 times

- Jenkinsburg, GA, USA

problem #2

Sep 122012

Tacoma 4WD 4-cyl

  • 15,000 miles
The contact owns a 2012 Tacoma. The contact stated that he added oil to the vehicle as directed by the owner's manual but the engine overflowed. The contact stated that the engine was overfilled by 19.2 oz. The manufacturer was contacted and informed the contact that the information listed in the owner's manual was correct. Updated 6/17/14

- Bar Harbor, ME, USA

problem #1

Feb 192014


  • 18,600 miles
After driving for 2 hours at highway speed (65) mph I exited the highway to a intersection with a red light. Upon applying the brakes to come to a stop the vehicle accelerated forward on its own. I was only able to stop a collision by putting the truck into neutral. I could not stop the vehicle by only using the brakes. The engine over revolutions but came back to a idle in just a few seconds. I have not experienced this in the past two years that I have owned this vehicle. I was not towing anything and the vehicle was not loaded with any additional weight. I am the only driver. I continued on with my trip and have not experienced this again as of this date. 02/20/2014

- Cranberry Twp, PA, USA

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