I've done some work and got my CEL off for a short period of time...now it's back on, and here's what I did.

I replace all four O2 sensors with a direct fit (not the splice in kind). Then I replaced the drivers side Cat with a walker universal because the drivers side was hallowed out and also replaced the muffler. I turned off the CEL and drove 10 miles where it then came back on. Following that, it then went off after about 10miles again and stayed off for about 20 miles when it then came back on.

the FIRST time it came BACK on after all the inital work, the codes were coming back that it was not reading the O2's on bank 1 sensor 1 and bank 2 sensor 2. (i'm sorry, I'll have to post the codes later as they are not infront of me). When the lights came back on the second time, I was getting the same code.

The part that confuses me is that the light went off it self. The exhaust that did the work said to drive 150-200 miles before worrying about it as it can time time on certain cars to register everything that's new. As of right now, it's been about 100miles since i've done this work.

I'll get the codes ASAP and post them.

THanks,
Steve

 

Ok the codes are:

P0135
P0155

 

I'm stumped...the light has gone off and on about 2 or 3 times today. All seems to be right from what I"m check. Not sure where to look next. Any suggestions?