HELP NEEDED can't shift. .traction control failure

[cgalpha08]

Hey guys. Got in the he this am...car said traction control failure, said I was in 1st gear when It was in park and I'm throwing a code. I can't shift out of park eiyher5. Scan Guage refuses to connect to vehicle. Thoughts? ??

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[Bigunit]

Battery or bad cables maybe. Try the battery disconnect and reconnect after waiting a couple minutes.

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[cgalpha08]

Got the codes

P0700-tran control sys error
U0101-lost comm with tcm
UOO73-ctrl mod comm bus off


Help please I have no idea what to do or what it all means

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[cgalpha08]

Managed to get into drive, I took it around the block and couldn't shift out of first

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[Bigunit]

Can you disconnect the connection to the BCM. Bad connection there maybe? Bad battery ground cable?

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[cgalpha08]

I need a new battery anyway it's still oem...after jigging with the connections it worked fine for a few min then back to no good

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[Bigunit]

Probably your battery and battery terminals. How old or new are the terminals?

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[cgalpha08]

Battery and terminals are oem...this alphas production date is late 07

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[Bigunit]

Those lasted a looong time for you. You are way over due to replace them all if that is the case.

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[cgalpha08]

Thanks for the advice big...going to do that right jow

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[cgalpha08]

Well a new battery seems to have fixed the issue for now

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[Bigunit]

That was fast and glad to hear that it may have been the cause and an easy fix.

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[cgalpha08]

Well I spoke too soon...getting a stabil sys failure. And while I was driving the shift point were really high for normal acceleration. Also the speedo doesn't work now

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[cgalpha08]

Update. ..cleared the dtc's everything seems to be working OK

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[cgalpha08]

So I was reading on a chevy cobalt forum about these codes and they are basically communication error codes between different modules. One guy said a device he plugged into his OBDII was shorted and gave him all.sorts of weird activity. Now that I think of it I have noticed that to be a pattern with me, I'll test It tomorrow

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[06 H3]

You changed the battery but not the terminals? Those cause havoc too.

 

[chaos254]

You changed the battery but not the terminals? Those cause havoc too.

+1 replace the terminals too. Communication errors a lot of times are caused by a bad battery/connection. Start with the terminals before you waste time chasing down those codes

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[cgalpha08]

Terminals are next on my list. Im taking it one item at a time to help narrow down the cause.

 

[Pappibri]

Let me know what terminals you use. I replaced my battery, but I need to replace my terminals as well:huh:

 

[ZWilson07]

Since I assume you bought a new battery with standard post style terminals id look into running a military style terminal connector.

I make sure to buy all my replacement batteries with the stud post style terminal and switch my connectors over to that stud style setup, but the military style setup is the next best thing if you have a standard post style battery.

Might seem like pain in the ass but for me the standard oem terminal connectors on vehicles 9 times out of 10, go to crap in a heartbeat once they have been taken off a few times and I hate dealing with them and how ugly they look. So its a no brainer for me but I can understand why some wouldn't want to spend the time/money on it.