I just had a brand new exhaust, both CAT's. both O2 sensors installed and still the CEL comes on. What else do I need to check in order for this light to turn off? HELP ME

 

What code are you getting?

 

Low eff.bank 1

 

What brand 02 sensors did you go with? What brand cat. did you go with?
Did you delete the code after you replaced everything?

Its generally recommended to go with an OEM Denso 02 sensor and nothing else.
Some say the same about cats. but (knock on wood) I'm having okay luck so far with my aftermarket cat.

If you used the 02's with a different brand then toss those out and buy the real deal.
http://www.urdusa.com/index.php?cPath=9_13

If that still doesn't help, buy the 02 simulator.
http://www.urdusa.com/index.php?cPath=66_170

 

I'm not sure what name brand the O2's are nor the CAT's. I had the work done at a friends Meineke shop. He gave me a great deal on everything. Not sure where Meineke purchases their parts and supplies from. Yes, every time the mech. replaced a part they would clear the system. I would drive it at least until it hit 60-100 mi. and the CEL would pop up. I was just told that a fuel discharge sensor could be the problem? Never heard of such a part. I'll keep you posted. Also, are there CERTAIN parts to use on a Tot rather then general after market ones?