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?

p0712 is transmission fluid temp if that helps. I didnt know bonnevilles had a tranny temp sensor.

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.

Thanks for reply. Does anyone know where this sensor may be???

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.

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.