CEL:U0100 and P0700?? - Chevy and GMC Duramax Diesel Forum

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post #1 of 4 (permalink) Old 02-16-2011, 06:53 PM Thread Starter
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CEL:U0100 and P0700??

My truck seems to be stuck in Tow/Haul (even though I never engaged it and the T/H light is not on) and I got a CEL with the following codes:

U0100 Lost Comm With ECM/PCM A
P0700 Tran Ctrl Sys Error

Anybody have any idea what caused this and how to fix it?

2006 Chevy 2500 LBZ 4x4 CCSB
4"TB, K&N, Nicktane/CAT, airbags, B&W, Bilsteins

None are more hopelessly enslaved than those who falsely believe they are free. --Johann Wolfgang von Goethe
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post #2 of 4 (permalink) Old 02-17-2011, 06:46 AM Thread Starter
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Bump

2006 Chevy 2500 LBZ 4x4 CCSB
4"TB, K&N, Nicktane/CAT, airbags, B&W, Bilsteins

None are more hopelessly enslaved than those who falsely believe they are free. --Johann Wolfgang von Goethe
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post #3 of 4 (permalink) Old 04-09-2011, 08:01 PM
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Ever figure out what caused this?

06 LBZ


Semper Fi
You can live for many causes, but you can only die for one. Pick that one very carefully.
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post #4 of 4 (permalink) Old 04-10-2011, 12:48 PM Thread Starter
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No. The CEL went away (after a few days) as mysteriously as it appeared, and I haven't had any problems since. Another member had the same experience. Apparently the TCM just glitched.

2006 Chevy 2500 LBZ 4x4 CCSB
4"TB, K&N, Nicktane/CAT, airbags, B&W, Bilsteins

None are more hopelessly enslaved than those who falsely believe they are free. --Johann Wolfgang von Goethe
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