The specific components for emissions warranty are listed in the owner's manual. I can't remember if that one's listed or not and I'm not near my owner's manual at the moment. I had my exhaust gas temp sensor replaced under warranty at 61K miles, but I think others needed to pay. Seems like it's up to the dealer.Yes it's a diesel. I haven't had any more coolant issues since I topped it and secured the cap. Would this nox sensor be the reason my mpg has been dramatically affected? Also is this a part that would fall under the emissions warranty?
Hello. Do you think both NOX sensors should be replaced or just the one that screws directly into the DPF? I know there is one by the DPF Back pressure Sensor toward the rear of the car. I am having issues with Code P2002.NOx Sensor 1 Performance - Signal Low. You have a NOx sensor issue, very common in these cars. It is most likely soot covered. Just to be sure check the car for intake and exhaust leaks, but the sensor most likely needs to be replaced.