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

posted by  bcg on  Thu Mar 14 05:03 CST 2013
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last visit: Sun Jul 27 08:12 CST 2014
[RELATED]

john,
from your tip, i rewired my knock sensor with new contacts and the belden wire. luckily, we have an altex store here in town. new contacts to the sensor are the same ones used for the injectors, so no problem there, and i bought volvo repair wires with contacts for the wires going to the bendix ignition control unit.

it's only been a week, but i notice immediately it's running a lot smoother, no codes thrown, and no rough idle in the mornings.

while doing the repair, i noticed the original green wire near the sensor end is brittle and had split, probably causing the short (grounding out) and throwing the codes. the split probably became worse when i and others handled the connector more often, trying to make sure of a good connection. the more the codes were thrown, the more the original wire was handled, the worse the problem became.

humid mornings caused idle problems, too. but all is fixed.

yes, i agree this fix should be a write up in the faq.

regards,
byron golden
86 245
92 245
94 940






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