I own a 04, black and blue mach 1. I recently had a bassini x pipe installed. My question is my check engine light came on and i think i know what its from? I heard its from the o2 sensors. Does anyone know what the over ride connectors are called or where i could find some?

 

Does the X have cats or is it an off-road pipe?

You want MIL Eliminators... A few companies make them. There's people in the forums who have had experiences with them and will be able to reccomend what to get.

Also, a handheld tuner can turn off the Rear O2 sensors, fixing the problem.

You may want to go to AutoZone and have them scan your code so you KNOW what it is instead of guessing. They'll do it for free.

Get some pics of the Mach up while you are at it.