really awful
Crashes / Fires:
1 / 0
Injuries / Deaths:
1 / 0
Average Mileage:
32,006 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 #12

Dec 132016


  • 91,000 miles


2012 Tacoma with 91,000 miles: While leaving work and trying to accelerate onto highway the "check engine" and "trac off" lights illuminated. Vehicle went into "limp mode" and would not go faster than 35 mph. I had to quickly pull off the road as to not cause an accident. I took vehicle to mac haik Toyota and received the code P2445. I had to replace air switch valve assembly $690, air w/bra pump assembly $813, air tube gaskets $132, labor $610. Total $2063!!!! from researching, this is a known problem with 2012 Tacoma, and had previously been an issue with older Tundra, which Toyota issued a tsb for. Toyota refuses to repair this under warranty (federal emissions) even though the failed part is directly tied to the emissions system! "the system is used to pump additional air into the exhaust manifold upon startup to dilute the over-rich conditions that lead to increased pollution. (how is that not an emissions related part?) the failure or warping of the one-way check valve causes hot exhaust gasses to backflow into the solenoid, and melting the gaskets. This ends up blocking the sealing plate and causing it to remain in the open position. The danger is that the hot exhaust is then fed into a plastic air pump causing it to potentially melt or catch fire!" the fact that this forces the vehicle into "limp mode" is also a huge safety concern as it will not allow the vehicle to travel above 35 mph and could lead to serious accidents if traveling at high speed on the interstate or highway due to the unexpected, sudden deceleration. Failed assembly is Toyota part number : 25710-31020. This part number has been superseded by P/N: 25710-31022.

- League City, TX, USA

problem #11

Nov 292016


  • 73,000 miles
Check engine light came on, trac off light is on. My truck has no power and is unsafe to drive. The dtc is P2442. Secondary air injection system switch valve stuck open bank 2. Toyota knows they have a emissions issue. My vehicle is at the dealership now.

- Terre Haute, IN, USA

problem #10

Sep 122016


  • 45,000 miles
Tacoma went in "limp mode" engine light and trac off light illuminated; cause the car to be extremely under power. Vehicle extremely under power causing to be dangerous in traffic. Code P2442 secondary injection system failure; common to other Toyota vehicles including Tundra's. Toyota acted resumable with Tundra's with extending warranty repairing but at this time refuses to repair known failures in Tacoma's.

- Catlettsburg, KY, USA

problem #9

Jun 302016


  • 45,066 miles


I started my Tacoma, the check engine light and trk off lights were on and after taking them to the dealer learned that the vechile was in limp mode. The truck will not easily accelerate beyond 30mph. This is caused by error code P2442 and P2440, from a known faulty part that Toyota refuses to replace.

- Wichita, KS, USA

problem #8

Jun 282016


  • 37,000 miles
I took my 2012 Tacoma into service today with a trac off and check engine light on. I was told that the secondary air injection switching valve needed replaced at the tune of $1300. I see that many others have had this issue and with 37K miles, I find it unreal that this isn't covered under the powertrain warranty.

- Columbia, MO, USA

problem #7

Jun 212015


  • 42,000 miles
The contact owns a 2012 Toyota Tacoma. While attempting to switch the vehicle to four wheel drive, a loud abnormal noise was heard. The vehicle suddenly accelerated with the brake pedal depressed. The contact shifted the gear into neutral; however, the vehicle continued to accelerate. The contact was able to bring the vehicle to a stop by depressing the brake pedal with force. The manufacturer was made aware of the failure. The vehicle was not diagnosed or repaired. The failure mileage was 42,000.

- Willmington , NC, USA

problem #6

Jan 072013


  • 5,000 miles


The contact owns a 2012 Toyota Tacoma. The contact stated that while coming to a stop, the vehicle accelerated independently. The failure occurred twice. The vehicle was not taken to the dealer for a diagnostic testing. The manufacturer was not notified of the failure. The approximate failure mileage was 5,000.

- Ipswich, MA, USA

problem #5

May 232014

Tacoma 6-cyl

  • Automatic transmission
  • miles
The contact owns a 2012 Toyota Tacoma. The contact stated that the accelerator pedal was depressed and the vehicle violently surged forward. The contact was not able to control the vehicle and crashed into a tree. A police report was filed. The contact sustained injuries to the neck, the back and the hands that required medical attention. The vehicle was not diagnosed or repaired. The manufacturer was notified of the failure. The approximate failure mileage was unknown. Updated 10/23/2014 updated 05/21/2015

- Winterville, GA, USA

problem #4

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

problem #3

Feb 172014

Tacoma 6-cyl

  • 20,900 miles
Vehicle jumps from rear upon acceleration from stop position.

- Medford, NY, USA

problem #2

Nov 052012


  • 1,500 miles
My Tacoma tends to surge forward when it is stopped. I do not think it has anything to do with the air conditioner being on.I had the A/C off the first time. If someone isn't on the brake firmly they may tap the vehicle in front of them.

- Leland, NC, USA

problem #1

Aug 012012


  • 5,000 miles
My Tacoma tends to surge forward when it is stopped. I think it has something to do with the air conditioner being on. If someone isn't on the brake firmly they may tap the vehicle in front of them.

- Elmhurst Twp, PA, USA

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