jake333 Posted October 16, 2016 Share Posted October 16, 2016 I have had consistent maf sensor codes of both p0100 and p0101, along with misfire codes and occasional egr codes. I tried a new maf sensor, but instantly got the same p0100 code.Could this possibly be a bad ecm? Otherwise I still need to test the connector to see if that all checks out. Can someone explain how to test the connector, a pin out explanation etc? Link to comment Share on other sites More sharing options...
jake333 Posted October 16, 2016 Author Share Posted October 16, 2016 Sorry, I forgot, it's a 1996 Subaru Legacy L wagon. Link to comment Share on other sites More sharing options...
Caboobaroo Posted October 20, 2016 Share Posted October 20, 2016 Did you replace the MAF with an OEM Subaru part or a cheap one from a parts house? More likely then not, it's a bad aftermarket MAF. the misfire codes can be related but the EGR code (probably a P0400) is not related. Link to comment Share on other sites More sharing options...
jake333 Posted October 22, 2016 Author Share Posted October 22, 2016 Thanks for the response. Yes the maf was from O'Reilly's. They are so expensive though, do you think I could find a useable one from a junkyard as long as it was OEM? Also, has anyone out there even heard of a computer malfunction on one of these cars? Just curious because I once had one with my Olds Bravada. It had a tps code, turned out to be a bad ecm... Link to comment Share on other sites More sharing options...
DaveT Posted October 22, 2016 Share Posted October 22, 2016 I'd probably try an oem junkyard one. ECU failures are exceedingly rare. Link to comment Share on other sites More sharing options...
mikec03 Posted October 22, 2016 Share Posted October 22, 2016 Yes, go to the junkyard! I don't really think that a new maf from O'Reilly would be bad, but you can't take a chance. They don't fail that often so the junkyard is the best place to get a replacement and make sure it's OEM. I've had to do it myself on a 90's car. As DaveT said, don't fool with the ecu yet. Link to comment Share on other sites More sharing options...
jake333 Posted October 29, 2016 Author Share Posted October 29, 2016 Thanks guys, I'll try that and see. I'm reasonably sure the EGR is a separate issue.It isn't moving like it should when I rev it up. I've seen some good YouTube videos on how to fix that. It's just strange that if unplug the MAF wiring connector and hold it close to the MAF, the engine dies and I start it up again it runs perfectly for a while! Link to comment Share on other sites More sharing options...
DaveT Posted October 29, 2016 Share Posted October 29, 2016 they have "default" settings so you are not stranded by a sensor failure. That may be coming into play. Link to comment Share on other sites More sharing options...
jake333 Posted March 24, 2017 Author Share Posted March 24, 2017 Hey guys, I'm not sure if this forum has any rules about jump starting old threads (some forums have lots of silly rules) but I wanted to update this subject. I put working on this on the back burner for a few months, but recently I had some problems with my work truck that could not be fixed in a day, so I decided to take another look at my Sooby. I went to the junkyard found an OEM maf sensor. Slapped it in and presto! Car running strong again! Misfire codes eliminated by changing to a set of NGK plugs. Now I only have to check out the EGR. I just wanted to thank the forum and the guys who replied to my posts. I was skeptical about the aftermarket maf sensor's unsuitability, but you guys were right. Junkyard part that fixed my car for 22 dollars sure beat a $300 aftermarket part that didn't work. I hope anyone else with similar or different problems listen to their advice. They know what they are talking about, either through experience, sheer brilliance, or both! 1 Link to comment Share on other sites More sharing options...
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