Farrierson Posted August 4, 2016 Share Posted August 4, 2016 I have a 2002 Forester with >200K miles, with a check engine light. Codes that popped up included: P1442 P1507 P0420 P1445 Link to comment Share on other sites More sharing options...
Fairtax4me Posted August 5, 2016 Share Posted August 5, 2016 (edited) Erase them. See if any come back. Edited August 5, 2016 by Fairtax4me 1 Link to comment Share on other sites More sharing options...
idosubaru Posted August 8, 2016 Share Posted August 8, 2016 P0420 is benign Clear them - check again - repeat: which one comes back first and most consistently? Any issues? Idle air controller is related to one of them. Clean and or replace. Link to comment Share on other sites More sharing options...
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