We are wondering if there's some other part that's bad that's causing the MAS to go bad? We're also wondering is there something that needs to be reset or callibrated when a new MAS sensor is installed? We're about ready to take it to the Subaru dealer for repair - but I'll be really upset if they say it's the MAS after we've replaced it twice!Īny help and suggestions would be GREATLY appreciated. Needless to say, hubby and I are both at the end of our ropes. Went to drive it the next day, check engine light stayed on when I started it and before I could pull it out of the garage it stalled.
Interesting to note - this time with installation the check engine light went out. We thought perhaps we had a bad MAS, so we took it back to AutoZone since it was still under warranty. Took it to the mechanics again and this is the information that came up "codes that came up were P0102, PO103, PO301, PO302, PO303 and PO404, first 2 codes for air flow signal, signal too high and too low, other codes are misfire codes on all 4 cylinders, mass air flow reads too high at idle 5.1 grams/second, should not exceed 4.8, data showed while cruising that mass air flow will stick at 199.1 grams/second and should be 2.6-16.5 grams/second, circuit from PCM and from MAS to PCM checked good, all data shows mass air flow sensor is fault". Then it started up again - not as bad at first, and now we couldn't blame it on rainy weather. For a couple of days it seemed like all was well, no sputtering, stalling, and no hesitation with acceleration. Hubby decided to go ahead and replace it himself so we ordered it from AutoZone. Ran fine during dry sunny weather and would act up again when it began to rain. We decided to put off repair and see if the problem persisted. We took it to the mechanics and they said the computer was showing a problem with the mass air flow sensor, would cost around $700 to replace it, but they couldn't be positive that was exactly what was causing the problem.
Pulled over and it stalled, managed to get it the rest of the way home. Mid-May during a very rainy weekend it began to sputter while driving on the freeway (felt like I had taken my foot off of the accelerator suddenly and then abruptly put it back on) and the check engine light came on.
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