Toyota Tundra Gas Cap Check Engine Light

The first thing you want to check is your gas cap.

Toyota tundra gas cap check engine light.

If your gas cap is not properly attached you may see a check engine light or a loose cap warning light on the dash. In some cases you need to pull over immediately to prevent damage while in others you merely need to tighten you gas cap next time you stop in order to reset the service engine soon light. Replaced the spark plugs and all of this via the advise of which ever repair shop has diagnosed the problem. Replaced the 02 sensor on the passenger side catalytic converter twice.

A properly sealed gas cap maintains pressure in your fuel tank and prevents harmful fumes from escaping. A check engine light can indicate a broad spectrum of problems with your 2008 toyota tundra. I have a 2000 tundra and the check engine light comes on as soon as the gas tank is less than half full. We have a 05 toyota tundra v8 2 wheel drive whos check engine light will no stay off no matter what we fix.

I had it reset several times but it always comes back on at 1 2 tank. I can not find a leak and the truck runs great. We replaced the ecm computer with a refurbished one. A loose or damaged gas cap.

You can either tighten the cap and wait for the system to reset itself when it determines the problem is fixed or you can use an obd ii code scanner to manually reset the system. Evap canister pcv valve evap valve o2 sensors. What to check when it s not the gas cap. Since it seals the fuel system and maintains fuel tank pressure it prevents gas fumes from being released into the atmosphere when your vehicle is not in use.

The check engine light alerts you to a loose broken or missing gas cap so you can tighten or replace it before you lose too much fuel. In this guide you will learn about common problems that trigger toyota check engine light and. How to reset your check engine light with no special tools duration.