2015 Toyota Tundra Fuel System Problems

Your truck shuts down unexpectedly after running for about 2 minutes, as if the ignition was turned off while driving. After waiting about 30 seconds, you can restart it, but it won't start immediately after shutting off—something seems to need time to reset. This happens whether you're driving or idling in your driveway, creating a safety hazard on the highway. The issue likely involves diagnosing the ignition system, fuel pump relay, or engine control module to find what's causing the unexpected shutdown.

Your truck died while you were driving and wouldn't start again. You also noticed terrible fuel economy and rough running. The dealer diagnosed a defective fuel pump—the same problem Toyota recalled in other model years—and replaced it with the part used in those recalls.

Your truck is having trouble starting in cold weather because the fuel pump and engine computer aren't communicating correctly about fuel type. The system is incorrectly detecting 56% ethanol content in your fuel even though you've only used regular gasoline, which causes the engine to run on the wrong fuel settings and reduces fuel economy. This appears to be a known issue affecting multiple Tundras. Fixing this will likely involve reprogramming the engine computer (ECU) and possibly replacing or recalibrating the fuel sensor.

VEHICLE EXPERIENCES EXCESSIVE CRANK AND NO START WHEN KEY TURNED DO TO PROBLEMS WITH FLEX FUEL SYSTEM DEALER HAS REFLAGGED TRUCK AND THE PROBLEM IS STILL ON GOING IN MANY VEHICLES

WITH THE MANY TIMES I HAVE SEVERELY TRIED TO START MY VEHICLE IT HAS A HARD START NOT DUE TO OTHER COMPONENTS SUCH AS THE BATTERY OR OTHER ELECTRICAL ISSUES BUT THE FLEX FUEL INTEGRATION IN THE SYSTEM NOT READING CORRECTLY. WITH THE REFLASH DONE MANY TIMES IT WILL STILL NOT RESOLVE THE ISSUE. WITH THE VEHICLE ALWAYS AT A COLD START WEATHER IT WOULD BE A HOT DAY OR A COLD DAY IT ALWAYS SEEMS TO HAVE THE HARD START ISSUE. THIS ISSUE HAS MANY AFFECTS ON DRIVERS SAFETY AND COULD CAUSE SEVERITY ON THE ENGINE WITH FAULTS SOON TO HAPPEN. THE SERVICE BULLETIN IS A START BUT SHOULD BE A RECALL DUE TO THE ERROR TOYOTA HAS MADE WITH THIS COSTING MANY MANY OWNERS TO SUFFER HAVING TO TAKE TIME OUT OF THEIR DAY TO DO THIS AND THE COSTLY EFFECTS IT HAS. THIS REMEDY SHOULD BE HEARD BY EVERYONE IN THE TOYOTA INSTITUTE TO FIX THE ISSUE AND HAVE A HASSLE FREE SOLUTION TO BETTER ASSIST AND MAKE THE TOYOTA OWNER HAPPY TO KEEP ON PURSUING AND BUYING TOYOTA TRUCKS.