Well I just replaced all my spark plugs, cleaned the maf and o2 sensors with elec contact spray. Started up the car and everything was fine until i drove it like a half a mile down the street, then i saw the hidious cel come on. Is it the o2 sensors? If it is will i be able to just change one sensor or is replacing 2 a must?

thank you

 

get the code read and then google the cel # and figure it out from there. its not rocket science my friend!

bob

 

...and you said sensor(s). I have never heard of both failing at the same time anyway. It will be bank 1 first - almost guaranteed. Get that code (Autozone will pull it for free).

 

i love it when you reply to my post, my friend!

 

Problem solved.. Ecu just needed to be reseted after cleaning of the o2 sensor.

 

i betcha it will be temporary. find someone w/ a code reader in the meantime

bob

 

good idea bob. I will do that just incase the cel will turn back on.

Randy

 

Ditto, cleaning the sensor will just prolong replacement for a few months.

 

what year is your truck?

if it is pre-95 (and, thus, OBD I instead of OBD II), you can easily pull the codes yourself using a paperclip or short piece of wire.

http://www.off-road.com/toyota/tech/codes/index.html