I have a 2003 Ford Gt Mustang 4.6 v-8 engine and the service engine light is on and I had it put on a computer and it read the back passenger side oxygen sensor is bad...it has 4 oxygen sensors..so i switched to 2 back oxygen sensors and had it checked again and it read the front passenger side one was bad so.I switched to 2 back ones back and bought a new one and put it on and it read the new one was bad..so I called 2 diffrent garages and both said it is probley the cataltytic converter..so I...
