Problem Reports

Check engine light came on...took to AutoZone to scan computer...one bad O2 (oxygen) sensor...ignored due to truck still running fine...checked again, periodically, and now 3 years later - all O2 sensors bad...but still runs! Can this lead to other problems?

Check engine light came on...o2 sensor replaced 2weeks later other o2 sensor replaced

had both top oxygen sensors go out replaced them myself for about $60. ea. autoparts123.com & saved a bundle over the dealer service dept. You will need a special socket for the sensor (my neighbor had one) Not very difficult if I can do it. You of course need to know which ones are out ! Most parts stores will scope it for you. Good luck

Both upstream sensors failed.

 Rookie

I am replacing my fifth O2 sensor and the codes have all cleared. No codes, no mils but 5 monitors did not reset. After 3 months of drive cycles, I got it reduced to 2 monitors not reset. That is enough to pass Penna. state inspection. On my way to the station, it jumped back to 4 not reset. There is nothing wrong with this vehicle and it passes emission tests. BUT, because Harrisburg can't see what the testing machine sees, I can't get a sticker.Seems like bureaucatic b.s. to me! Anyone out there with this problem?