Cadillac Catera and Cimarron Forum Discussion, Bank 1 sensor 1 in Past Cadillac Vehicle Discussion; I got code 0135 and 0115 o2 sensor bank. 1 sensor 1 and coolant temp sensor circuit . Changed temp ...
I got code 0135 and 0115 o2 sensor bank. 1 sensor 1 and coolant temp sensor circuit . Changed temp sensor code still there. My question is bank 1 sensor 1 is the right side before the cat. Is this a upstream or downstream sensor? I'm going to by it from rockauto and need to know exactly what I'm getting. Thanks for any info.
Ok I don't get it. I replaced both of these sensors, erased the codes and they still come back like right away. They were the correct parts because they are exact from the ones removed. All connections look good from what I can see. What could be the issue? I have a 2000 body but a 1999 engine. Does the computer look for something different from the two years or what. Please help
Oh by the way the car runs perfect. But this service engine light is very annoying
O2 sensors are part of the emissions system, not the exhaust system. "Regular maintenance" does not apply to O2 sensors, they either work, or they don't. If there's a problem with an O2 sensor, a code will set,and the CEL will illuminate.