Some Clarity on TBC Fault - Ford Powerstroke Diesel Forum
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Old 05-14-2013, 05:12 AM
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Some Clarity on TBC Fault

Ok, I've read a hundred threads on TBC fault with little consistency or solution. It seems like most of those threads die before the solution is shared. I've seen everything from a TBC light leading to a no crank, no start, to simply using brake cleaner to blast the connector.

Well, it happened to me this morning (Not towing). I had a slightly longer crank to get it started this morning. I shut it down in the drivethru to order and when I turned the key to start it up again I got the TBC fault light. She started up and drove just fine. I'd like to nip this in the bud before something big happens.

EGR Delete
New HPOP
STC tow tune
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Old 05-14-2013, 05:20 AM
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I would try the simple stuff like inspect the plug at the rear and wires behind the plug

and then I would also unplug the module and replug it

I agree to the dead ended post although I haven't had the issues I had followed plenty of threads
they either fixed a wire issue /the TBC fixed itself/it was replaced / or the thread was never updated
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Old 05-14-2013, 05:38 AM
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Thanks. I'll start there tonight. It's kind of wild to see all of the many, many symtoms that can trigger the TBC fault.
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Old 05-14-2013, 05:45 AM
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it's also interesting to see how much more integrated into the truck it is than a aftermarket controller

I do remember the pre 05 ish units had more issues but that was usually with a trailer due to the output voltage

I have never used mine LOL all th trailers either have no brakes / the one dump trailer must not be wired properly ? and my boat is hydraulic surge braked LOL
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Old 05-14-2013, 06:51 AM
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FWIW, when I changed out my injectors and was priming the oil rails (cranking) with the FICM relay/fuse and GPCM fuse pulled, the TBC fault showed up after about 20 seconds (?) of cranking. For the next 2 cranks it remained. When I reinstalled the fuses, The truck fired right up without the message. I didn't bother trying to trace why the TBC message came up in this instance.
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