There are 4 of them. They are labeled as follows:Polski Polak said:damn i dont know um do u know where they all are??? thanks
The P0135 code means the B1S1 sensor is not working properly, and that's why you're getting the emissions system message on the dash. Change out that sensor with AC-Delco part number AFS109 and you will solve both problems and get better gas mileage and performance as well. Here's a link to the O2 sensors available for your car at www.rockauto.com:Polski Polak said:actually i do not know of any codes that i have for the o2 sensors i have been getting a "emmisions system servie" message and i heard that it could be the o2 sensor in the bank 1 sensor 1, the code i have PC0135 (translates to P0135) so i am going to try to find and then soon change that sensor and hopefully that should fix the problem thanks again!!!