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xcav8er 09-14-2013 05:49 PM

Code u0001 Can/c/bus
Hey guys, I'm new to this forum, but it looks like ya'll have some good threads on here. My question is this, what is the can c bus? My truck started acting funny, the warning buzzer went off, gauges dropped,engine light, abs light, trans temp light, brake light all came on.I turned the truck off to get the code(s), no code came up, truck would not start back up, everything worked except the starter! Ended up replacing a battery, (one went bad in june), got the truck started, engine light still on and guages still acting stupid, had it scanned at a local shop and got codes, p0462(fuel),p0532(a/c),u0001(can/c/bus), u1412(vehicle speed sensor), u0141(lost communication w/PCM).I know all the codes came from a loss of voltage I'm sure, I guess what I'm asking is if anyone has had this happen, and what specifically did you do to fix it,(i.e. replace grounds, or battery cables).Any and all advice is EXTREMLY appreciated!!

RogerRamJet 09-14-2013 08:00 PM

Check to make sure the ground to the PCM is in fact grounded. Then make sure that the wire harness is tightly connected to the PCM.

xcav8er 09-14-2013 09:02 PM

I took all grounds that I could find loose, cleaned them and put them back, still acting stupid. I didn't check the harness at the PCM, will deffinitly check that in the morning.Funny thing is the engine light is on, but the truck wont give me a code now??

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