I have the same issue my CEL light is on, I run the scan tool and it turns out to be the P0036 code,Now it all started with my mufler i drove it to the local dealer and they told me it was my mufler that was leaking,the sugest me to change the hole exhaust system and what i did is that i installed an aftermarket exhaust system(OBX got it from ebay),they told me that that should clear the CEL.and if not it was going o be a damage 02 sensor.I drove the car to the DMV for emmision test and it fail it show that a P0138 02 sensor bank 1 and bank 2 was the problem.i went on line and got an universal 4wire 02 sensor that i had to wired my self so i did it and it turns that now the P0036 code is the problem. i checked the wires and there is a black,grey and 2 white cables i wired the cables but i took a guess on the 2 white.my CEl light turned on again,i switch the 2 white wires an the problem won't go away any suggestions cuz im going nutz with all this codes and this CEL light thing.