Did cluster test got 920 921 & 999. It's losing speed sense. I unplugged every sensor on the 5v and still no bus. Weird thing is it will start sometimes if you keep turning the key. Also it ran for 15 seconds then shut off showing "No Bus." Been fighting this for months now and can't figure it out.

One thing that did work is if you pulled the engine fuse in the interior fuse box and replaced it with another same amp fuse (even though it wasn't blown) it would get the "No Bus" message to go out for 30 seconds run then die. Any help will be greatly appreciated.

 

Check for 5 volts on the sensor rail while it shows nobus/no start.

If you dont have 5 volts, then the internal voltage regulator for the microprocessor and sensors has failed.

 

So if I don't have 5v with all sensors unplugged what do I change? Also what are you calling the sensor rail? If it helps I did try a new computer to no avail