I have a 2001 Dodge Neon and was warming it up and the Engine Light came on. Where the odometer is it said "No Bus". I turned off the car and back on it was no longer on. I checked at Allpar.com for codes and found nothing. Does anyone have any Ideas?

Means there's no communication from the pcm, the pcm is bad.

Means there's no communication from the pcm, the pcm is bad.


What does PCM mean?Thanks for your help

Primary control module. The computer.

Primary control module. The computer.

The light has not come back on . Do I need to be worried?

I would be if it happened again. It is cold outside these days and it causes lots of computerized things to act up too...

I would be if it happened again. It is cold outside these days and it causes lots of computerized things to act up too...

Thats what Iam thinking. That morning was freaking cold. I was plugged in . Seems to be fine now though. Will a code show up when you do the on/off thing. Whats a new PCM cost? Will the engine just die when it goes?

No. Lots. Yes.

No. Lots. Yes.

Thanks