April 21, 200817 yr My CEL has been on for a while and the fuel economy has gone down the tubes. I pulled codes P0325 and P0106 out which I believe are knock sensor and MAP sensor respectively. Is it possible that these 2 codes are related? If the knock sensor fails I understand that the ECU will retard the timing to protect the engine from detonation, Is it possible that this can affect the MAP sensor at all? Also, I just want to confirm the location of the MAP sensor it's on the manifold pass. side has 3 wires identified with ABC right?
April 21, 200817 yr the MAP sensor is located on the passangers side shock tower ( at least it is on my 96' Legacy).....i dont believe they would be related (but lord knows electricity does some weird stuff)......did both of the codes set at the same time? I also believe that the knock sensors on this year/model are prone to cracking on the side that contacts the block......
April 21, 200817 yr Author Yes, it seems knock sensor failure is common on Subarus of this vintage and I have one on order. As for the MAP sensor, what does yours look like? I have looked at everything on the pass side strut tower but not really sure what Im looking for. The item that I thought was the MAP sensor is bolted directly to the manifold is kind of cylindrical in shape with a grey adjustable cap on top.
April 22, 200817 yr http://www.ultimatesubaru.org/forum/attachment.php?attachmentid=5699&d=1208455598 it's a "rusty" one but it's a pic - pax side shock tower - the car was supposed to be a 95
April 22, 200817 yr Author http://www.ultimatesubaru.org/forum/attachment.php?attachmentid=5699&d=1208455598 it's a "rusty" one but it's a pic - pax side shock tower - the car was supposed to be a 95 Thank you, I do recall seeing that part and I really appreciate your effort to find and post the picture. I live in Ontario and the old Legacy has to pass an emmisions test by June or she's off the road. I initially ruled out that part because I thought I read that the MAP sensor had 3 wires. Going to replace knock sensor this week and see if the light comes back on.
April 28, 200817 yr Can anyone provide the torque spec for the knock sensor?Here you go: http://endwrench.com/images/pdfs/1995Subaru.pdf Better to be on the low than the high side of the spec.
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