bad pcm regulator
loose connection at battery or pcm or ipc bad ignition switch too much crap hanging from key
No.
Bad coil? Bad rotor? Bad distributor cap? Bad Ballast resistor?
P1389, no asd relay voltage at the PCM. Causes include blown fuse, bad relay, broken wires, bad PCM.
No you can't.
Your heater core is probably bad.
it could either be a bad beattery or a bad starter
Bad bearing in blower motor?
Bad Throttle Position Sensor
Bearing going bad?
No bus means there is no signal from the PCM,most likely a bad PCM,but check all your fuses and connections on PCM