it sounds like there maybe nothing wrong with the sensors or the car but the mufflers are causing the code/light to trigger which can happen if you modify the exhaust.
Gm doesn't have to replace the sensor under warranty, if the sensor is bad which it may not be, they could claim that the exhaust mods caused the failure.
cars today are highly tuned and precise, when you change the exhaust you have to expect that the ECM may need custom tuning, and then custom tuning voids your warranty even further, which is why It's better not to mess with it in the first place.
2012 1LS Silver Ice - Mods - SS Strut Brace, RX Catch Can, BBK CAI, TRS Bi-Xenon HID's, Blackout Grill, RX65 Radar Detector, 700watt 4 Channel Amp with Kicker Speakers, 4Pack Gauges Added, 30% tint. Baer Drilled Rotors & pads, 20" American Racing. Awesome car.
Last edited by CyberPunk223; 07-21-2013 at 12:39 PM.