Toyota Tundra Gas Cap Check Engine Light

I ve replaced the gas cap and always make sure it is tight.

Toyota tundra gas cap check engine light.

Replaced the 02 sensor on the passenger side catalytic converter twice. Replaced the spark plugs and all of this via the advise of which ever repair shop has diagnosed the problem. I can not find a leak and the truck runs great. What to check when it s not the gas cap.

We have a 05 toyota tundra v8 2 wheel drive whos check engine light will no stay off no matter what we fix. The first thing you want to check is your gas cap. Toyota check engine or service engine soon light may come on due to something as simple as a loose gas cap but it can also be an indication of a number of other issues including bad spark plugs faulty oxygen sensor dirty mass airflow sensor and even an early indication of a transmission problem. 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.

A properly sealed gas cap maintains pressure in your fuel tank and prevents harmful fumes from escaping. If your gas cap is not properly attached you may see a check engine light or a loose cap warning light on the dash. How to reset your check engine light with no special tools duration. A check engine light can indicate a broad spectrum of problems with your 2008 toyota tundra.

If the check engine light goes on in your 2016 toyota camry be sure to check your o2 sensor. I have a 2000 tundra and the check engine light comes on as soon as the gas tank is less than half full. 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.

I had it reset several times but it always comes back on at 1 2 tank. 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. We replaced the ecm computer with a refurbished one.