1996 Bonneville p0712 code? - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 04-11-2012, 12:02 AM   #1
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Default 1996 Bonneville p0712 code?

Just got a Bonnie with 237000 mi on it. Got a P0712 code on it and I don't believe OD is working. Any ideas on if or how to fix?
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Old 04-13-2012, 10:28 PM   #2
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p0712 is transmission fluid temp if that helps. I didnt know bonnevilles had a tranny temp sensor.
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Old 04-14-2012, 09:25 AM   #3
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712 says circuit shorted to ground. i dont know about transmisions but i would assume its in the trans so it could be shorted any where in the trans or where that circuit goes to pcm. the sensor reads low resistance for cold so the pcm thinks its cold and thats why it seems the od isnt working.
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Old 10-18-2012, 10:42 PM   #4
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Thanks for reply. Does anyone know where this sensor may be???
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Old 10-18-2012, 11:12 PM   #5
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I do! Take a look at this transmission manual on page 50; it'* highlighted part F.. To get at it, you need to drain the transmission (easy) and remove the side cover (harder).

Also, welcome to GM Forum, Matt! Hopefully someone here can teach you how to get that side cover off. I've heard you need to either lower or remove the transmission and subframe, but I'm not positive.
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Old 10-19-2012, 12:10 AM   #6
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Thanks for the info. Will check it out. Not sure if its worth messing with to much. Seems to work fine, just no overdrive. Been like this a while too.
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