2012 Toyota Tundra Problems

What owners report

Most owner complaints for this model year center on the secondary air injection system, which owners describe as sending the truck into reduced-power limp mode with the check engine and TRAC OFF lights on, often near highway speeds. Cam tower oil leaks on 5.7L trucks and power steering rack leaks are also reported, generally at moderate to higher mileage. Steering and engine complaints dominate the total counts, and owners frequently mention that similar fixes were covered on earlier model years but not this one.

1. 1
   Engine

   Secondary air injection pump/valve failure, limp mode

   • 55 complaints (35%)
   • median 87,065 mi at 7.3 yrs old (44 state mileage)
   • owner-quoted repair $3,000 (median of 17 quotes)
   • filed 2012–2023

   Owners describe the check engine light, TRAC OFF light and sometimes a flashing 4LO indicator coming on, after which the truck drops into a reduced-power limp mode that limits speed, sometimes to 25-45 mph. Many say the dealer diagnosed the secondary air injection pump and switching valves, with repair quotes commonly in the $2,000-$2,800 range. Several complaints note that the same part was addressed through a warranty enhancement or recall on earlier model years but not on their 2012 truck, and that a repair did not always prevent the problem from returning. Some owners mention the problem appearing after rain, after refueling, or during cold starts. Most often reported between roughly 60,000 and 110,000 miles, in mixed city and highway driving.

   2 related service bulletins

   What to check: Ask whether the secondary air injection pumps and valves have been replaced and get the repair paperwork; scan for stored codes P0418, P2432 or P2440 during a pre-purchase inspection.

   2 excerpts from owner complaints in NHTSA records

   “Secondary air injection pump and secondary air injection switching value causing check engine and trac control lights to come on. I was told by the dealer that the same piece and design was recalled on the 2011 but not the 2012 Tundra. It comes on and off but when it is on it feels like that there is a limp mode making it difficult to get up to speed on the highway. The steering feels different which I think is the traction control.”

   NHTSA complaint #11222498, filed 2019-06, 80,000 miles

   “2012 Tundra 4.6 v8 my truck will go into limp mode and the 4lo light flashes, check engine, and trac off lights were all on. Almost complete lose of power will happen. In traffic I end up blocking ever vehicle behind me, because the truck will not reach the speed limit. If there is a hill then the truck barely moves going up the hill. After looking online I saw it's a pretty common problem on Toyota with the secondary air injection pump seizing. …”

   NHTSA complaint #11319365, filed 2020-03, 96,000 miles
2. 2
   Engine

   Cam tower / camshaft seal oil leak (5.7L)

   • 6 complaints (4%)
   • median 85,500 mi at 7.0 yrs old (4 state mileage, few)
   • 1 mention a crash, fire or injury
   • filed 2017–2022

   Owners of 5.7L trucks describe oil seeping from the cam tower area, in some cases dripping onto the exhaust manifold and producing a burning smell or damaging nearby wiring and sensors. Repairs are described as costly, with quotes ranging from a few hundred to several thousand dollars depending on the extent. Some report the leak was repaired under powertrain warranty while others say it was outside coverage and at their own expense. Reported from as low as 15,000 miles up through roughly 175,000 miles, with several examples under 100,000 miles.

   What to check: Inspect the cam tower area and exhaust manifold on the 5.7L for oil residue or a burnt smell, and check for any service record of a cam seal or cam tower reseal.

   2 excerpts from owner complaints in NHTSA records

   “My 4x4 Toyota Tundra crewmax with the 5.7l engine was diagnosed with a cam tower leak with only 15,000 miles on it. Fortunately the vehicle was still under the factory power train warranty. Toyota made the repair and provided a rental car for me. I have heard this is a common problem with the 2012-2013 5.7l engine and I want this issue to be more public. I worry owners of this vehicle will be stuck with the $2,300-$3,000 bill to fix their own vehicle if their vehicle's power train warranty has expired. …”

   NHTSA complaint #10959583, filed 2017-03, 15,000 miles

   “I bought a certified used 2012 platinum Tundra with 32k miles and 2 years later with regular maintenance and a cam seal leak fixed by the dealer, I have found a very hard rod knock from the engine. I took my truck back to the dealership to have the oil and filter changed with 114.8k miles on it at this time and was told I will need to replace the engine. I believe something isn't smelling right. Does anyone know any issues with the connection of the cam seal leak and the rod ready to blow. The dealership said it would be approx. …”

   NHTSA complaint #11030165, filed 2017-09, 100,000 miles

Buying note. A pre-purchase scan for secondary air injection codes and a look at the cam tower area, steering rack boots and fuel tank valve are the most useful checks on this model year. Service records showing those repairs were already completed are worth more than low mileage alone.

Summary written with AI from a sample of 60 NHTSA complaints for this model year (picked at random, with complaints that state a mileage and recent ones taken first), then checked automatically against the source records. Where a problem shows a complaint count, every complaint for this model year was matched with fixed keyword rules (written with AI and tested against the sample), and the mileage, age and repair figures are calculated from those complaints; owners' figures are as stated, not verified. Other counts refer to the sample. The excerpts come from NHTSA's public complaint records and are unverified; capitalisation is normalised, NHTSA staff notes are removed, and shortened text ends with “…”. Something wrong? Request a correction.