I had a check engine light on my 2001 SE, took it to the dealer about 2 years ago during warranty and they had to re program the ECU??? Later about 9 months...light on again, had an O2 sensor needed to be replaced and did. ok 6 months later another light, gave me an O2 code, had the code just cleared and on the scanner it was on there 2 times, left it, went away for a few days and came on again. What is with this car and O2 sensors? its a daily work car as I am a mustang guy so I know little on this car. Please let me know what you can, any help is greatly appreciated. thanks.

 

i just had my light come on a few weeks back..wound up being the gas cap..as dumb as it sounds it will set off the code..its worth a try..unless u really do have a serious problem with the 02 sensor???

 

goto autozone and have them pull the code for you. its free. it could be the 02 sensor again, the ignition coils or something else...

 

Dave,
I have had the same problems and have very little advice. Did they replace 2 o2s at a time? how much did they charge?

 

Did they actually re-program the ECU? Cause there is no way to tell unless they give you CONSULT2 printout or you scan it yourself, and its definetly possible they did not re-program anything (happend to me).