I have a 2000 Camaro SS with an M6 with 96,500 miles. I bought the car early last year from the second owner and the car had 80,000 at that time. Almost a week after owning the car, I stomped on the throttle and kicked on the SES light; the codes were P0137 and P0157, which corresponds to the back o2 sensors in bank one and two respectively.

I replaced the sensors and drove the car for a while and noticed that mileage was total crap, and as fate would have it, the dern SES light came back on again with codes P0137 and P0157. I changed the sensors yet again, and noticed that my cat converters were bad as well, so I swapped them out for a set of 49 state legal Magnaflow factory install units that look nearly identical to the factory ones, but are not California Compliant. I also changed the sensors yet again. I bought a hypertech PP3 from a friend and installed the programming, and like a total dumb ***, put 100 octane in the car, not knowing it was leaded gas. I ended up getting the code again, and realized that I detroyed the o2 sensors by running the leaded gas in it.

Well, I decided to take the car to my exhaust guy and have him put in my SLP Y-pipe, and install yet 4 new AC Delco o2 sensors. I noticed the car seemed very nimble after all this, so I went home and installed a 160 thermostat and re-installed the Hypertech. The car seemed fine, but when I stomped on the throttle this morning on the way to work, the car kicked on the SES light again the codes readning P0137 and P0157. I removed the hypertech programming on my lunch and am going to see what that does. I also cleared the DTC's with the programmer as well, but I fear my problem is something far worse.

Here are the specifics on the car, it is bone stock, but has the dual dual performance cat back from SLP, along with a Blackwing airlid and Holly Powershot air filter. I have changed the plugs with AC delco' and replaced the wires with a set of GM Perfromance Parts 8mm wires. Everything else is bone stock. I notice that the engine runs noticably rougher than my other car (2002 LS-1), and it seems to hesitate once in a while, when taking off. Any help is greatly appreciated.

Rick

 

I think the leaded gas ruins your cat's too. Did you replace them as well?

-Geoff

 

No need buying all of those parts and wasting money.

Both of those codes refer to the rear 02s, which do absolutely nothing performance or repair-wise. Either buy some O2 sims and plug them in, or go to a local tuner and get the codes turned off.

Mike

 

But why do they keep getting kicked on? When I drove home form the exhaust shop, which is about 25 miles from home, the code did not come on. It did not come on until I re-installed the hypertech tuning. I noticed that when I did install the tune, the car ran rough, almost like a lean condition. When I un-installed the tuning, the car felt like it ran perfectly smooth again, but kicked on the SES light almost 5 miles after driving. This is really driving me nuts.

 

Hypertech tuning is garbage. It'll actually make your car slower. Do a search about it.

There's no reason to keep throwing money at it. You've already spent $200-300+ and have done nothing. Take my advice and make the problem go away forever. Those codes mean NOTHING.

 

Should I have a tune done also, and have them edited?

 

Yeah, since you're already going to a tuning shop, a tune wouldn't hurt.

Most LS1 performance shops can do a flash tune in literally 5 minutes which will turn your fans on earlier for much lower engine temps, delete the rear 02, AIR, and EGR, change your gear ratio, remove CAGS, edit torque management and shift points for autos, spark/fuel tables for more power, etc for around $100-150.

 

Awesome, thank you very much fior the input Kraest.

 

No problem

 

And keep all of those O2 sensors that you bought. They can work for replacements for the fronts if you ever need them. Only difference is the wire lengths.