First time posting on here so bare with me,
Bought my 2006 4.6l 3v v8 mustang about four months ago. Had catless xpipe which I switched to the stock exhaust. Couldn’t get my o2 sensors to ready so I kept driving it and still nothing. I then replaced one of the upstream and one of the downstream sensors. All of my o2 sensors started working except the passenger side downstream sensor. I replaced the clip that attaches the o2 sensor to the wiring harness and still no voltage reading for the passenger downstream sensor. I had a friend test the voltage of all four wires going to that sensor and he said only one of the wires has a bad connection/voltage. So that led me to checking the grounds by the hood prop and still no luck. My guess is either a secret tune on the car or a bad wire somewhere over the transmission. Any advice? Ideas? Any advice for how to check the wires that go over the trans without dropping it or bringing it to a shop?
Bought my 2006 4.6l 3v v8 mustang about four months ago. Had catless xpipe which I switched to the stock exhaust. Couldn’t get my o2 sensors to ready so I kept driving it and still nothing. I then replaced one of the upstream and one of the downstream sensors. All of my o2 sensors started working except the passenger side downstream sensor. I replaced the clip that attaches the o2 sensor to the wiring harness and still no voltage reading for the passenger downstream sensor. I had a friend test the voltage of all four wires going to that sensor and he said only one of the wires has a bad connection/voltage. So that led me to checking the grounds by the hood prop and still no luck. My guess is either a secret tune on the car or a bad wire somewhere over the transmission. Any advice? Ideas? Any advice for how to check the wires that go over the trans without dropping it or bringing it to a shop?