Actually, with a Subaru, when it sets a knock sensor code, you can replace it without disconnecting the battery or resetting the ECM to erase the code. The first time it is started, the ECM sees that the problem is corrected and the MIL (CEL) goes out.
Tried to fix my knock sensor
Alright everyone, I got the P0325 code and I did some research about it. I decided it was a cracked knock sensor like everyone says happens to them... Well I pulled it off and looked it over really well and it wasn't cracked but I already bought a new one so I decided to put the new one on. I put it on and started up my car and it starts up fine but then dies after a second, then if I give it gas it will die even quicker. Now when I scan for codes it doesn't show any codes. I put the old sensor back on and now the same thing. I'm not incompetent in working on cars but I'm also no expert. Any help?
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It could be a loose fit at the sensor, a break or fray in the wire somewhere to the harness, you bought a faulty sensor or it was overtightened. Highly unlikely it's the ECM.
If the knock sensor and circuit are good, look into the timing belt, fuel delivery and cam & crank sensors.
If the knock sensor and circuit are good, look into the timing belt, fuel delivery and cam & crank sensors.
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