02 sensor questions

[04fullitgt]

I recently threw an ses light on my 04 GT, it was for something else but the other codes that were in it said that for all 4 of my 02 sensors that there is a heater circuit malfunction and now and then it will say that they are stuck lean I cleared the codes but they keep coming back up. Im running a catless X-pipe with MIL eliminators in the back, is this caused by that or is something screwed up here? :SNSign:

 

[the98stang]

Data log to see if the car is running lean. Also check the o2 voltage. Did you replace the o2's when you swapped out the stocker midpipe? How many miles are on the car?

 

[justinschmidt1]

Im having a similar problem with my 96 gt...comes up as bank 1 sensor 2 lean or something.Does this mean I need a new sensor?

 

[04fullitgt]

When I check it with my scantool, it will say that one or two of them are stuck on lean now and then but it always says that the heater circuit isnt working. I did just recently replace the sensors (friday night) because I figured thats what the problem was when the codes first stated showing up. The car just hit 17000 miles yesterday damn this technology!
The car has been running like doo-doo lately also.

 

[Dragstr05]

If your getting codes for ALL 4 of your O2's then you probably dont have a problem with the O2's themselves. Lean codes should only be associated with the 2 front O2's. With MIL's you shouldnt be getting any codes for the rear O2's.

A lean code doesnt necessarily mean your O2 is bad. You *may* have 2 separate issues. I wouldnt concentrate on the heater circuit malfuncion. If its both O2's, its probabaly a wiring or connection issue somewhere.

 

[justinschmidt1]

I was told longtubes will cause the lean code to come on...and a tune should be able to fix it...what should I do?

 

[04fullitgt]

Pulled up the codes again. Its the front sensors that are throwing the lean code. This bites! everytime I hook up the scantool a new code comes up. Im up to 9 codes now. 2 EVAP probs, the 02 heater circuit prob, the lean prob, and now an EGR prob! WTF DID I DO!?!? Im never touchin this car again!

 

[jtroush2002]

you prob blew your fuses number 2 and 8 (under the dash)
check (replace) them then come back and update

 

[jtroush2002]

you prob blew your fuses number 2 and 8 (under the dash)
check (replace) them then come back and update

 

[jtroush2002]

you prob blew your fuses number 2 and 8 (under the dash)
check (replace) them then come back and update

 

[04fullitgt]

Thanks, I'll check it out in a few

 

[04fullitgt]

you prob blew your fuses number 2 and 8 (under the dash)
check (replace) them then come back and update

You, my friend, are a god!
#8 fuse was blown! NO MORE CODES! WOOHOO!:SNSign:
Thanks a ton man! I was about to call the dealership and give up on it. I woulda felt retarded having them come back and tell me it was a fuse.
thanks again!

 

[the98stang]

Sweet. Glad you got her fixed!

 

[squeak93]

Stupid question....... Is this a common problem? Have read a ton of threads here but this is the first I have read about fused and o2's causing Check Engine codes.... Hmm..... Good info.