I get a '' no bus'' fault when its wet out, had it checked out, had battery replaced, terminals, grounds redone, harness from main fuse bussto column checked, still happens occasionally.
"no bus" means the communication line (wire) between the modules is down. It could be shorted to ground or power externally or a module itself is pulling it down. The engine, transmission, antilock brake, airbag, instrument cluster, and overhead console modules all use the same bus line to relay information to each other. One way to isolate the faulty module is to disconnect each module one by one with the key on until the "no bus" goes away and the odometer comes back to normal. This isn't an easy fault to find since the PCI bus line runs everywhere but I would start with isolating modules. I hope this helps.
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