2001 Saturn SL2

PROBLEMCHILD15

MEMBER
2001 SATURN SL2

2001 Saturn SL2 Automatic 110000 miles

My 2001 Saturn SL2 drives very smoothly and is without flaw except that every once in a while it will jerk. It is throwing codes: P0789, P0740, P0781, P0756, and P0741. We've taken it to a few mechanics, who don't seem to know what to do. A suggestion was the wiring harness. My dad cleaned out (with an electrical cleaner) our wiring harness, and he says he can't find a thing wrong with it looking at it. The Service Engine Soon light comes on as well. Please help me with any specific advice. Thank you!

Monday, October 18th, 2010 AT 9:55 AM

2 Replies

PROBLEMCHILD15

MEMBER
2 POSTS

My dad completely replaced the transmission pig tail and all the old wire was removed and replaced with new wire. All the same codes have come up. We're hoping to go on a 1200 mile road trip tomorrow night because I have to get back to my Naval base, so we're going to try one more diagnostic at a dealership tomorrow, but in the mean time we're still stumped.

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Wednesday, October 20th, 2010 AT 7:17 PM

KASEKENNY

MECHANIC
18,907 POSTS

More than likely, you have another wiring issue somewhere in the harness but the way we need to figure this out is to get the vehicle to act up while we are monitoring the voltage at the transmission/valve body.

Here is a guide that will help with this:

https://www.2carpros.com/articles/how-to-check-wiring

We can also use a scan tool to monitor the solenoids, but I suspect we are going to find a wiring issue.

I am attaching the info below on the DTC that we need to start with.

Please run through this and let us know what questions you have.

Thanks

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