My check engine light wont go off on my 2000 toyota tacoma

check for a vacuum leak..

luiluiu

Get a trouble code when the light is on, that will be a start.

at the bottom of the dash on the drivers side,

I have a 2000 Tacoma Extra Cab Pre Runner. When I put on my camper shell my check engine light comes on. Oil levels and tires are fine. I took my shell off and light goes off. I hauled alot of wood and the light did not come on. Why would the camper shell be trip-en my light? Ofcourse I am gunna get the code checked next week.

If the car still runs then the problem is not major but may develop into one if unchecked. The sensors in the engine may have detected problems and should be stored in its ECU. If you have a scanner have it connected to the diagnostics it should give you a clue on what to check out.

i had the same thing, i had it tested at auto zone and they said it was the obd2. i was told the o2 sensor was not a big deal so i reset the check engine light by holding down the trip meter button while starting her up and it has not been on since.

Not positive on this so consider only. The o2 sensor is what actually tells everything else what is going on with emmission and everything else adjusts to what info it relays. The o2 is also subjected to extreme temps and cooling cycles. So, instead of spending money on no answer diagnostism give replacement of o3 sensor so consideratio. If you choose to replace, wd40 and let exhaust cool down. Good Luck.

clogged injectors you need to put cleaner in the fuel to help get dirt and grit out of them some times (every 3 months).
I am assuming you are saying it will turn over but not fire and run when cold?

Try turning the parking brake handle and pressing it in. If that does not work then replace the under dash sensor on the parking brake (not the brake pedal). Hope this helps.