Welcome to the North American Subaru Impreza Owners Club Tuesday May 18, 2021
Home Forums Images WikiNASIOC Products Store Modifications Upgrade Garage
Go Back   NASIOC > NASIOC Technical > Service & Maintenance

Welcome to NASIOC - The world's largest online community for Subaru enthusiasts!
Welcome to the NASIOC.com Subaru forum.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, free of charge, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!

If you have any problems with the registration process or your account login, please contact us.

* As an Amazon Associate I earn from qualifying purchases. 
* Registered users of the site do not see these ads. 
Thread Tools Display Modes
Old 08-28-2015, 10:19 AM   #26
Scooby Newbie
Member#: 429005
Join Date: Aug 2015

I just had this issue pop up on my wife's 2008 Outback 2.5i with 100,000 on it. Didn't correlate with anything specific, just driving down the interstate. Same symptoms, drives fine, shifts fine, etc. P0700 and a P1718. Also had an intermittent P0600. Couldn't find anything helpful on the forums, so I took it to the dealer for diagnostics and found the driver side cam oil pressure sensor was out and leaking. They sold me the part for $45 and I put it in myself with a 15/16" deep socket. Pulled the neg battery terminal for a couple minutes, re installed it, and started. No more code for the last week since I've changed it so it must have fixed it. Worth a shot, here's a tutorial on it over on the Outback forums. Evidently this sensor tells the VVL solenoid the pressure available and without that reading it throws these codes. The dealer also blamed "dirty oil", although the oil that's in that car is less than 1000 miles old, so I was more apprehensive of that answer, but it could be someone else's cause.

* Registered users of the site do not see these ads.
spudders52 is offline   Reply With Quote
Sponsored Links
* Registered users of the site do not see these ads.
Old 11-21-2017, 12:06 AM   #27
NASIOC Supporter
Member#: 30669
Join Date: Dec 2002
Chapter/Region: Tri-State
Location: USA, North NJ, 07456
1998 Legacy 2.5GT
Silver Sleeper BK, 5MT


OK, searched but no real answers, just questions.

2009 Outback 2.5, about 130K miles.
Friend owns it, had questions.

Came to me with a P0420.
This summer had HG's done, coolant change, timing belt, plugs, etc.
CEL was recent, owner tired of spending money.

I went over things, went for test drive, then popped the P1718.
Cleared CEL, popped again.
When this happens, traction control light, AT temp light and another light come on. Car goes into limp mode and "stuck" in a low gear.
Everything says CAN wiring but not touched by me.
I did see the front engine grounds were broken off, likely when HG's were done so I replaced them.
Owner needed the car back so I don't know if that fixed it or not. I will have to wait and see.
Any thoughts?
Charlie-III is offline   Reply With Quote
Old 04-10-2019, 09:14 AM   #28
Scooby Newbie
Member#: 500195
Join Date: Apr 2019
Default ***Solved*** p1718+p0700

Well well
I guess I should give one back to the forums

If U have the canbus error, p1718, for me, it was the abs module was faulty...

Being the dtc pointed to the p0700 TCU, it threw me,

The symptoms were flashing power, cruise and persistent cel.

Hope this helps...

Originally Posted by Bubakanush View Post
2006 Impreza 2.5i, 4EAT
78,000 miles
Mods: Williaty hybrid intake, STI catback
CEL(s): P0700(Transmission Control System malfunction), P1718(AT CAN communication circuit)

I have searched all over this forum and the internet for solutions to this, but every thread seems to end without the OP ever posting how they fixed the issue..

Two days ago I drove to the gym, car was fine. However, when I left, the CEL came on. At first, the AT OIL temp was illuminated, but is no longer on. So I pulled the codes and got a p0700 and a p1718. Car still seems to be driving fine, no weird smells, still shifts smoothly and idles great. I attempted to clear the codes, but they stayed on. The only information I've been able to gather is that a few posters say it could be some sort of loose connection in the wiring/connectors, a short in the system or a loose ground but I have NO idea at all where to look for these Transmission connections.
I've recently changed the oil and had the cooling system flushed before winter. Other than that, I haven't done any work on it recently.

Only mods are the Williaty Hybrid intake mod from here(been on for about 4 months, never any problems/CELS before) and an STI catback.

Any input at all would really be appreciated. I am at a loss here and the light has been on for about 5 days now. I am starting to get worried since it is my only DD. Just wanted to see if anyone had any solutions before I take it in to the dealer.
Eastbayray is offline   Reply With Quote
Old 04-02-2021, 03:34 PM   #29
Scooby Newbie
Member#: 463876
Join Date: Mar 2017
Chapter/Region: E. Canada
Location: Canada
2009 Impreza Hatch


Originally Posted by Bubakanush View Post

I have searched all over this forum and the internet for solutions to this, but every thread seems to end without the OP ever posting how they fixed the issue..

LOL, perhaps you did the same thing
Did you ever find solution?

Having similar issue with a 2009 Impreza.
check engine light

fault codes P1718 & P0700.
the AT OIL Temp light on

I disconnected battery cleaned all terminal reconnected. Need to drive it and see if the AT OIL Temp lights up again. Its off now.

Last post before this someone mentioned the ABS module being faulty, can anyone comment on that?

PotatoChipNinja is offline   Reply With Quote

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

All times are GMT -4. The time now is 04:44 AM.

Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2021, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2021 Axivo Inc.
Copyright ©1999 - 2019, North American Subaru Impreza Owners Club, Inc.

As an Amazon Associate I earn from qualifying purchases.