sirtokesalot Posted August 14, 2018 Share Posted August 14, 2018 (edited) can the knock sensor just fail out of the blue? i have a 1995 legacy 2.2 in a 1998 outback the car drove perfectly normal last time i drove it and this morning when i tried to take it to work it had no power and a p0325 knock sensor code that if i erased would come right back. Edited August 14, 2018 by sirtokesalot Quote Link to comment Share on other sites More sharing options...
lmdew Posted August 14, 2018 Share Posted August 14, 2018 Yes they will do that. Just make sure you get the bolt started by hand so it's not cross threaded and the sensor points back into the lower section of the block. It retards your timing so low power and poor gas mileage. Quote Link to comment Share on other sites More sharing options...
sirtokesalot Posted August 15, 2018 Author Share Posted August 15, 2018 yep i grabbed the knock sensor from my friends 2001 parts car and re pinned it into my old ones connector. it was a one wire knock sensor like the one that came off. problems fixed. 2 Quote Link to comment Share on other sites More sharing options...
GeneralDisorder Posted August 16, 2018 Share Posted August 16, 2018 Problem is NOT fixed. The 2.5 sensor has a different connector because the 2.2 and 2.5 use different piezoelectric crystal frequencies and it will not correctly identify knock events. It has the right resistance to make the ECU diagnostic subroutines happy but it will not function the same and may lead to detonation and a premature rod bearing failure. Subaru engines are very sensitive to detonation. GD 1 1 Quote Link to comment Share on other sites More sharing options...
sirtokesalot Posted August 18, 2018 Author Share Posted August 18, 2018 well i ordered one on ebay. i tried. Quote Link to comment Share on other sites More sharing options...
lmdew Posted August 18, 2018 Share Posted August 18, 2018 Learn something new each day! 1 Quote Link to comment Share on other sites More sharing options...
GeneralDisorder Posted August 18, 2018 Share Posted August 18, 2018 Incidentally, the kock sensor frequency is mostly determined by bore size. GD Quote Link to comment Share on other sites More sharing options...
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