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how to get to knock sensor

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Old 10-07-2010, 05:54 PM
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stolenphoto I just noticed you're in kettering, you're probably only 30-40 mins from me
Old 10-20-2010, 03:43 PM
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well, by some enormous coincidence the check engine light just came on on my other car (2000 honda civic) so I got the codes read, guess what ails the car...


... that's right, code P0325: knock sensor malfunction

so I get a little practice on these stupid knock sensors, hopefully it's in a less stupid place than the one on the truck
Old 10-20-2010, 03:56 PM
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honestly man....

really test the sensor and make sure it's the sensor that malfunctions...

other things can cause the sensor to trip a light, even other sensors...

Knock sensors work off the ground...meaning if it test malfunctions its not sensing a ground at all...ohms test it to ground unplugged...

then tap the block lightly with a hammer or wrench and the ohms should jump one way or the other...

its like the same way a vacuum leak will cause a MAP sensor to trip or the O2 to go Lean or Rich depending how it reads...you can get two malfunctioning sensors just off a simple vacuum leak...

dont ever just assume a sensor is bad....check the voltages running if you can to see if they are in range and even if they are in the low range that can mean a loose ground somewhere not making full contact. All sensors fed off that ground will read low...or spike high
Old 10-20-2010, 04:07 PM
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im pretty sure what the arrow is pointing to is the oil pressure sensor. just my .02 replaced on my 250 once. pain in the ***
Old 10-20-2010, 06:00 PM
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Either remove intake or transmission...ur choice.
Old 10-20-2010, 06:45 PM
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I know the sensor isn't necessarily bad, but it's still a pain to get to it to test it



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