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2011 Forester X AT
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4,235 Posts
Discussion Starter #1
I know the older (pre 2000ish) knock sensors had issues cracking and throwing codes. Does anyone know if this holds true to a 2002?

I just had headgaskets replaced two months ago and now I'm suddenly getting a P4035 code (knock sensor wiring). The connections are secure, orientation of sensor is per the manual, and it doesn't look cracked. Not sure if I should just spend the $85 on a new sensor or look into something else.
 

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1998 Cayenne GTS 6speed
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1,752 Posts
Check the wiring, check the continuity, check the resistance (around 0.5MOm, iirc). And the sensor itself. Be careful of overtightening - these things break easily.
 
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