June 5, 200520 yr Check Engine Light (CEL) came on about two months ago on our 1999 Forester. The SUV is very hesitant under lower acceleration when moving for the first time or setting awhile. Appears to clear up after gaining speed but CEL is always on. Changed the fuel filer but is still an issue. Had AutoZone pull the code and it was PO335 or PO325. Any thoughts? Thanks if advance for your assistance.
June 6, 200520 yr PO325 = Knock sensor code - probably needs a new sensor PO335= Crankshaft position sensor - probably needs a new sensor SEA#3
June 6, 200520 yr Author Great information and thanks. I’m pretty sure it was the knock sensor. Any thoughts on why the knock sensor would cause hesitation under lower acceleration when moving for the first time or setting awhile?
June 7, 200520 yr The knock sensor retards the engine timing when it detects knocking. This has the effect of decreasing the octane requirement of the engine, and hopefully stops the knocking. Bottom line, the knock sensor is broken, giving a false positive signal, and your engine is retarded.
June 7, 200520 yr ... and your engine is retarded. I don't think that is a politically correct way to refer to a "slow" engine
June 7, 200520 yr Author Thank you for the information everyone and the attempt to make me feel better about my retarded, I mean “slow” engine.
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