2012 Toyota Tundra Fuel System Problems

Your truck started leaking fuel when accelerating from a stop, and you noticed a strong fuel smell. Turning the vehicle off and back on temporarily stopped the leak. A mechanic diagnosed the problem as a faulty fuel tank valve assembly and replaced it, but the leak continued to happen. The issue first appeared at 20,000 miles. Fixing this likely requires replacing the fuel tank valve assembly or inspecting the fuel tank system for additional damage.

Your Tundra's fuel pump failed suddenly, triggering multiple check engine lights on the dashboard. Your mechanic reports this is a known issue with a technical service bulletin from Toyota, and they've seen cases where the fuel pump fails completely while driving—which could leave you stranded on the highway. The fuel pump needs to be replaced with an upgraded specification since the original pump isn't sufficient.

Your truck's engine control module triggered a safety recall related to the air injection pump, which helps reduce emissions. This pump may fail, potentially affecting engine performance and emissions control. The fix will likely involve inspecting and replacing the air injection pump as part of the recall service.

THE TRAC OFF LIGHT AND CHECK ENGINE LIGHT CANS ON AT THE SAME TIME. I TOOK IT TO TOYOTA AND THEY SAID THERE WAS AN EXTENDED WARRANTY OF 10 YEARS OF 150,000 MILES. IF IT WAS THE SECONDARY VALVES AND AIR PUMPS. I GOT A CALL BACK AND THEY SAID IT WAS, BIG MY VIN WAS NOT PART OF THE EXTENDED WARRANTY. THIS IS AN ISSUES WITH 100S OF TUNDRAS. THIS IS A SAFETY ISSUE. BECAUSE YOU CAN'T GO OVER 60 OR GET TO 60 SAFELY. THE TOYOTA BLOGS ARE FULL OF TUNDRA OWNERS COMPLAINING. THIS NEEDS TO BE FIXED.

MY 2012 TUNDRA HAD A TRAC OFF AND ENGINE LIGHT COME ON. THIS IS THE SAME PROBLEM FOR NUMEROUS TOYOTA TUNDRA IN REGARDS TO FAILURE OF THE SECONDARY AIR VALVES AND PUMPS. I WAS TOLD MY VIN NUMBER WAS NOT ON THE 10 YEAR , 150,000 MILE WARRANTY FOR THIS SAME PROBLEM. I URGE YOU TO FORCE TOYOTA TO ADD MY VIN NUMBER TO THE EXTENDED WARRANTY. MY VEHICLE CANNOT GO OVER 60 AND BE SAFE. IT WAS RAINING AND RAIN GOT INTO THE PUMP SYSTEM. TOYOTA HAS REPLACED THOUSANDS OF THESE BADLY DESIGNED SYSTEM AND MORE NEEDS TO BE DONE. IT COST OVER $2,000 TO REPLACE BADLY DESIGNED SYSTEM.

2012 TOYOTA TUNDRA 4.6 L AT 101,000 MILES WENT INTO LIMP MODE CAUSING A LACK OF POWER AND ACCELERATION DURING CITY DRIVING WHICH COULD HAVE RESULTED IN A REAR END COLLISION. WAS ABLE TO LIMP VEHICLE TO NEARBY TOYOTA DEALER WHO DIAGNOSED THAT THE SECONDARY AIR INJECTION SYSTEM WAS FAULTY. COST TO REPAIR WAS MORE THAN I WANTED TO PAY BEINGTHAT I HAD JUST PURCHASED THE TRUCK WITHIN THE PAST MONTH OR SO. TOYOTA DID NOT COVER THE REPAIR SO A BYPASS KIT WAS INSTALLED AT MY EXPENSE TO GET THE TRUCK BACK UNDER POWER. CONTACTED TOYOTA AND THEY ADVISED THAT THE SYSTEM WAS NOT COVERED HOWEVER IT SHOULD BE NOTED THAT ON 2010 MODELS AND OTHERS THE WARRANTY ON THE SYSTEM WAS EXTENDED TO 150,000 BUT NOT ON THE 2012 4.6L ENGINES THAT HAVE THE SAME PROBLEMS AS THE OTHERS.

TL* THE CONTACT OWNS A 2012 TOYOTA TUNDRA. THE CONTACT STATED AFTER THE CHECK ENGINE LIGHT ILLUMINATED, THE VEHICLE WAS TAKEN TO WALKER TOYOTA (5735 COLISEUM BLVD, ALEXANDRIA, LA 71303) TO BE DIAGNOSED. IT WAS DETERMINED THAT THERE WAS A HESITATION IN RESPONSE WHEN THE ACCELERATOR PEDAL WAS DEPRESSED. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE BUT OFFERED NO ASSISTANCE. THE FAILURE MILEAGE WAS 97,000. *LN CONSUMER STATED MANUFACTURER IS AWARE OF THE ISSUE WITH 2010,2011, AND 2012 FUEL/PROPULSION SYSTEM (PWS) TOYOTA TUNDRAS. UPDATE: TOYOTA TECHNICIAN STATED ISSUE MAY BE PUMPS AND VALVES.*JB

CHECK ENGINE AND TRACTION LIGHT CAME ON. 4LO SIGN FLASHED. VEHICLE GOES INTO LIMP MODE, SLOWING DOWN, AND AT TIMES CREEPING ALONG WHILE THE VEHICLE WAS IN MOTION ON THE HIGHWAY. THERE IS A LARGE DECREASE IN PERFORMANCE ESPECIALLY GOING UP ANY SORT OF INCLINE. TOOK IT TO THE TOYOTA DEALERSHIP FOR EVALUATION. THEY RECOMMENDED REPLACEMENT OF THE FUEL PUMP AND WAS TOLD TOYOTA IS AWARE OF THIS PROBLEM AND THIS MAKE/MODEL IS NOT PART OF THE RECALL AT THIS TIME. I CALLED THE TOYOTA HOTLINE, AND THE WORKER VERIFIED SHE COULD SEE INFO ON THE RECALL TALKING ABOUT WARNING SIGNS -BUT THEY WERE NOT SPECIFIC. SHE FORWARDED ON MY INFORMATION TO ANOTHER INDIVIDUAL. THAT INDIVIDUAL CALLED TODAY, AND SHE ADVISED MY WARRANTY WAS OVER AND MY VEHICLE WAS NOT INCLUDED IN THE RECALL.

MY 2012 TUNDRA HAS JUST UNDER 70,000 MILES ON IT AND THE TRAC LIGHT AND ENGINE LIGHT CAME ON YESTERDAY. HAD IT LOOKED AT AND THE MECHANIC SAYS THE PROBLEM IS WITH THE SECONDARY AIR PUMP AND IT IS A KNOWN PROBLEM. CALLED THE DEALER AND THEY KNEW OF THE PROBLEM AND TOLD ME THERE IS A CSP THAT COVERS CERTAIN 2012 TUNDRA'S. UNFORTUNATELY THE CSP ONLY COVERS THE 5.7 L. ENGINES AND NOT MY 4.6L MODEL. MY MECHANIC SAYS THAT EVERYTHING IS THE EXACT SAME SET UP AS FAR AS THE SECONDARY AIR PUMP, IT'S JUST A DIFFERENT SIZE ENGINE. NOT SURE WHY ONE IS COVERED BUT THE OTHER ISN'T BUT I'LL HAVE TO SUCK IT UP AND PAY THE PRICE. MAYBE IF MORE PEOPLE MAKE TOYOTA AWARE OF THIS THEY WILL EVENTUALLY COVER IT. I'M A TOYOTA FAN AND HAVE BEEN DRIVING THEM FOR 40 YEARS AND THIS WON'T PUSH ME AWAY BUT IT IS DISAPPOINTING.

CHECK ENGINE LIGHT CAME ON.THE CODE SHOES P0418 AIR INJECTION VALVE/PUMP. 76,000 MI ON ENGINE. CRUISING DOWN INTERSTATE LOST POWER. TOYOTA EXTENDED WARRANTY UP TO 2011 MODELS.KNOWN PROBLEM

AT FIRST I STARTED HEARING WHAT SOUND LIKE A FAN RUNNING UNDER THE HOOD AFTER I STARTED MY TRUCK. ABOUT A WEEK LATER MY CHECK ENGINE LIGHT CAME ON FOLLOWED BY THE TRACK LIGHT. CODE P2442 WHICH STATED THAT THE AIR INJECTOR PUMPS AND VALVES WERE FAILING. WE BROUGHT THE TRUCK TO TOYOTA AND THEY HAD TOLD US THAT IT WOULD COST US 4000.00 TO GET IT FIXED, AFTER CHARGING US 144.72 TO HOOK A CODE READER TO IT WHICH WOULD OF COST US NOTHING TO TAKE IT TO AUTO ZONE. OUR WARRANTY WAS SUPPOSED TO COVER BUMPER TO BUMPER UP 10YRS OR 100,000 MILES WITH EVER CAME FIRST. THEY TOLD US THAT OUR WARRANTY EXPIRED THE WEEK BEFORE WE BROUGHT IT IN.

THE SECONDARY AIR INJECTION SYSTEM HAS FAILED. IT IS A COMMON PROBLEM ON TUNDRAS. POWER LOSS OCCURS WHILE DRIVING AND THE VEHICLE CANT GET OVER 45MPH.

CODE P2440 SWITCHING VALVE. WARRANTIES COVER 2012 TACOMA'S BUT NOT TUNDRAS. PART WHICH IS A SWITCHING VALVE CAUSES THE VEHICLE TO GO FROM 60 TO 30 MPH CAUSING AN UNSAFE CONDITION.

I EXPERIENCED AN EXTREME POWER LOSS WHICH MADE IT VERY DANGEROUS TO DRIVE. WHEN BRINGING TO THE DEALERSHIP THEY INFORMED ME THAT THE SECONDARY AIR INTAKE SYSTEM NEEDED TO BE REPLACED AT A COST OF $4,000. UPON RESEARCHING I FOUND THAT THIS PROBLEM HAS OCCURRED ON SIMILAR VEHICLES DATING BACK TO 2007. A RECALL AND REPLACEMENT WAS ISSUED FOR ALL EFFECTED VEHICLES FROM 2007-2010. IT APPEARS THAT THE PROBLEM CONTINUES AFTER THAT DATE BUT NOT ENOUGH CUSTOMERS HAVE COMPLAINED OR EXPERIENCED THE PROBLEM YET.

TL* THE CONTACT OWNS A 2012 TOYOTA TUNDRA. WHILE ATTEMPTING TO DRIVE THE VEHICLE, THE CONTACT NOTICED THAT THE CHECK ENGINE INDICATOR ILLUMINATED. THE DEALER STATED THAT THERE WAS A PUNCTURE IN THE FUEL LINE. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS NOTIFIED. THE APPROXIMATE FAILURE MILEAGE WAS 51,000.