A few months ago I installed headers and test pipes and ran that setup for about a week. It was too noisy for me, so I put the stock cats back on and have been driving it that way ever since.
Immediately after the initial header/testpipe install, I got an SES light. I cleared it using the TS tapdance method numerous times, but it always came back and stayed on. I figured when I put the cats back on and immediately reset the ECU, I wouldn't get that damned SES light....wrong. It refuses to go away!! I've reset it numerous times, and it goes away just until I finish driving and shut off the car. Immediately thereafter when I start the car, the SES light comes on again!! I'm about to go out and buy new O2 sensor for the cats, but I want to get some opinions and insight from the members here. Did I damage the sensors when I ran the testpipes? Whats going on?

I have a 2003 Track with JWT Popcharger, topspeed headers, and UR crank pulley (if it matters).

 

You need to see what code is being thrown in order to determine if the o2 sensors are bad.

Spend a couple hundred bucks and get a code reader/dataloger.

 

ztropic
If you can do the tap dance, just dont do the last 10 second bit & your ECU is now in diagnostic mode. Just count the check engine flashes.
EG: 10 followed by 3 then 3 then 5 = DTC 0335. crank angle sensor