mdjdc Posted June 3, 2009 Share Posted June 3, 2009 My 99 OBW died yesterday and ran like it had jumped timing. Today i tried to start it to put in the shed so I could check and replace the TB. It ran like a champ, but the check engine light was on. I went to advance auto and the code pulled a P1507. I looked it up and it came back as an Idle control malfunction (fail safe). The tech cleared the code and it has been running fine, but I would like to know what happened yesterday so I can prevent it from happening again. Where do I go from here? Do I just wait and see if it happens again. One thing I did was to clean and re-oil my K/N air filter on Saturday. Could that have caused a problem. I used very little oil and only on the airbox side. Thanks Guys Quote Link to comment Share on other sites More sharing options...
OB99W Posted June 3, 2009 Share Posted June 3, 2009 One thing I did was to clean and re-oil my K/N air filter on Saturday. Could that have caused a problem. I used very little oil and only on the airbox side. Check for intake air leaks, and also see this: http://endwrench.com/images/pdfs/DiagTroubSum04.pdf . Quote Link to comment Share on other sites More sharing options...
mdjdc Posted June 3, 2009 Author Share Posted June 3, 2009 Thank you for that info. I will check the switch tomorrow. It is funny, since I just put this tranny in this past Saturday. I might just replace the switch with the one in my old tranny to be safe. Quote Link to comment Share on other sites More sharing options...
OB99W Posted June 3, 2009 Share Posted June 3, 2009 (edited) You're welcome. It does seem like the neutral switch itself (or its operation/connection) is the likely cause of the code in your case -- the ECU thinks the car is in neutral when it isn't, and acts accordingly. When the ECU triggers the P1507 code, it also puts the system into a ''limping'' mode, and that's probably the poor-running condition you experienced. Edited June 3, 2009 by OB99W Corrected grammar! Quote Link to comment Share on other sites More sharing options...
mdjdc Posted June 3, 2009 Author Share Posted June 3, 2009 Thanks Again. I'm glad it is going to be a simple fix. I have a friend who wants to buy her from me and I am going to move into a 99 Forester manual with 144K on it. Quote Link to comment Share on other sites More sharing options...
Powerfun Posted March 1, 2011 Share Posted March 1, 2011 Thank you for that info. I will check the switch tomorrow. It is funny, since I just put this tranny in this past Saturday. I might just replace the switch with the one in my old tranny to be safe. What switch on the tranny caused this? The link no longer works. I have the same problem and just replaced the tranny, it a manual. Quote Link to comment Share on other sites More sharing options...
mdjdc Posted March 2, 2011 Author Share Posted March 2, 2011 Once I replaced the switch the code went away. It was a real easy fix. Quote Link to comment Share on other sites More sharing options...
bstone Posted March 2, 2011 Share Posted March 2, 2011 I had this code and went crazy with it for weeks. I replaced the TPS, IACV, checked over and over vacuum leaks, replaced the neutral safety switch. In the end I brought it to the local independent subaru specialist who replaced the throttle body and adjusted the TPS which took care of it. Quote Link to comment Share on other sites More sharing options...
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