So I put another engine into an 09 Outback and now am getting codes that never existed before. It runs and drives around town and through the neighborhood great but under load on the highway it shut down. The codes lead me to believe that there is a automatic transmission issue but that is a completely new situation for this car. Codes p1718, p0700, p0715, p0725 have all come up and it did so while accelerating hard on the interstate so as to merge and change lanes. There is no previous history of that happening in the car. The only thing I thought may have been an issue would have been the drivers side VVT solenoid since the donor engine had some battery acid spillage from the wreck on that side which may or may not have gotten into the electronics. Could this be due to oil temp sensors not operating or the VVT solenoid not performing?

Edited December 4, 20178 yr by iriejedi

Did you put a jack under the transmission? Lifting the trans too high can pinch the wire harness on top of the trans.

Or if a jack was put directly on the pan wiring inside the pan can be damaged.

Did you put a jack under the transmission? Lifting the trans too high can pinch the wire harness on top of the trans.

Or if a jack was put directly on the pan wiring inside the pan can be damaged.

I jacked the tranny up to install the engine. I did not put the jack on the pan but rather the front bottom side of the transmission on the aluminum casting.

Edited December 5, 20178 yr by iriejedi

This is an old thread that I created and I just wanted to update people that I got the problem fixed. It seems that I had a bad alternator and Armature in the alternator was intermittently causing power spikes and power loss. This created a whole host of problems throughout the car in the transmission in everything else and it took me a long time to figure out because when I tested the alternator it tested fine. Once it ran for 10 or 15 minutes it started throwing all kinds of problems. Alternators in these cars seem to be very important and will create unknown mischievious electrical problems when they fail.

Thanks for coming back & posting the update and how you fixed your car!

 

And yes, alternators can cause all sorts of weird problems. I had one that would cause issues when it got warm, too, but thankfully, mine ended up being easier to diagnose.

Yeah, good job getting it sorted. Sometimes the wonkiest, furthest thing is the culprit.

Ya I figured it out 4 or 5 months ago and realized I never posted an update. Thanks guys.