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sometimes the MIL's wont work its hit and miss and the tuner can do alot more than turn off o2 sensorsyou can squeze out more hp and recalibrate the speedo for diffrent size tires and gears adjust shift points in auto transand read trouble codes,but they run about 380-400 dollars
so unless someone has a tuner for cheap, i guess i'll keep my stock exhaust , b/c i sure as hell dont wanna pay much for anything just b/c im a cheap bastard
You can get an o/r H pipe for around $170-180. Just live with the CEL for a while until you get tuned or something. The rear O2 sensors do not effect the running of the engine.