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Old 11-10-2019, 08:34 AM   #3
Scooby Newbie
Member#: 309719
Join Date: Feb 2012
Location: Dayton OH
2012 Forester XT


Originally Posted by blue wrench View Post
There is an old bulletin Subaru issued for a few model years, including yours, where they noted that a bad wiring joint at the engine harness could cause random intermittent codes. Might be worth looking into. Subaru TSB 07-96-15
Strange you mentioned this. I have had some random codes. I opened the bulk-head connector and cleaned all the contacts, reconnected, repeated several times. Ditto for the large connector adjacent to the ABS system. I have also been doing these same steps to all the electrical connections in the engine compartment as I come across them. All the 'random codes' have vanished.

But, the problem above is not a 'random CEL' issue. The hot engine is really idling rough, misfiring, almost to the point of stalling. You can feel it or hear it - you don't need a code reader.
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