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93 940 w/ Regina keeps tripping Check Engine light for knock sensor code 143 900 1994

posted by  dinomartino on  Thu Jan 24 18:21 CST 2013
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last visit: Fri Oct 24 04:43 CST 2014
[RELATED]

I had this problem on my 1993 945 for years. Finally solved it by running a new, shielded wire from the sensor to the ignition computer plug, and routing it well away from other wires that could be corrupting the signal.

Got the wire from an electronics supply store, it has 2 conductors plus the shielding. Bought new connector clips from the dealer for the ends going into the ICU plug, and got a used sensor-end connector from the junkyard. I left the original wiring in place, just tucked out of the way. Grounded the shielding at both ends of the new wire.

I have not had a knock sensor error code since doing this over a year ago.

john
--
1989 245 241K / 1993 945 127K






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