Turns over but won't start no gauges
I have a 2002 dodge durange. Just had the
transmission replaced. It was running for 2
weeks fine but I had problems with my cat
converter, so I got dual exhaust. A week later
it turns over but won't start, no gauges are
coming on. It says no bus and after a few
minutes all of my check gauge lights come
on saying I need gas, and check engine so
forth. I have replaced the fuel pump relay, it
has a new battery and I have checked the
grounds. Now I don't know if the 02 sensor
has anything to do with it but I have 1 that the
mechanic never hooked back up. The front
male o2 plug is bare wires and hanging, the
female is broken hanging on by 1 wire. But
the rear o2 is hooked up and fine. Please help
I just put 3 grand into getting my truck fixed
after a year and now this.
The no bus codes are 920, 921, and 999.