Hey guys, my parents have a '02 Saturn Vue 6 cylinder 3.0L

they are getting P1779, P1780, P0700 error codes - and 2 of them were about the gas pedal, my dad didn't wright down all the codes. I checked the ECM and TCM connections they were fine no corrosion, pins looked good, doesn't looked like the connections were every removed before.

Before they just start dumping money into it buying this and that... do you have any idea on what it could be? I was thinking it's the TCM since the codes are all about the transmission. The TCM and ECM are about $200 each and don't want to waste money they are on a tight budget.

thanks in advance for you help
Aaron

 

I don't have a codes book, but seeing as how that's an AWD, shot gunning parts at it can add up very quickly. Seems like the automatic Vues have had a lot of problems. I had a defective EGR valve on an Equinox I had, and it turned on all of the AWD related lights on it. You might pull the EGR valve and check to see if it has a lot of carbon built up on it. Clean it and the passage and reinstall it and see what happens. You can call your local auto parts store and give them the codes and they can tell you what they're related to.

 

Check your ground cables, and make sure they are tight. Also, flex the positive cable back and forth -- if it is brittle, and "crunches", replace it, because battery acid is eating the cable up from the inside. Saturns are very sensitive to low battery voltage

 

thanks I'll try cleaning the EGR valve and check the pos cable.

should have listed what the codes are:
P1779 Engine Torque Delivered To TCM Signal
P1780 Park/Neutral Postion (PNP) Switch Circuit Engine Torque Signal Circuit
P0700-transmission control system malfunction

 

While you're under the hood, check the wiring harness on your transmission too. You might unplug it and get some electrical contact cleaner and give it a couple of sprays. Then plug it back in and unplug it a few times to help sweep the contacts. Plug it back in and see if the codes come back. IF you do this, disconnect your battery ground first.

 

I cleaned the connections on the ECM, TCM, and throttle body. I also applied dielectric to all the connections. this year doesn't have an EGR vavle, the neg and pos cables were in good shape, there was a little corrosion on the neg cable going to the battery terminal, cleaned that up...cleared the codes and took it for a couple of drives today no errors came up.. i hope that fixed the problem... if more codes come up again I'll let you know. thanks for you help.

 

You are most welcome

 

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