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

posted by  ippo on  Thu Jan 27 23:21 CST 2011
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last visit: Wed May 30 23:36 CST 2012
[RELATED]

UPDATE - Knock sensor trouble light fixed. One of two things fixed it:

1. Changed the plugs from old copper core to Bosch Platinum. The old plugs looked okay and car appeared to run fine. Maybe the engine was missing or knocking slightly and we didn't notice.

OR

2. The Fuel Injection/Radio Suppression Relay went bad and caused an intermittent warm non-start and stall. Replaced the relay. The bad relay was possiblily causing an intermittent lean condition and knock.

Anyway it's fixed and thought I'd share the fix.

Rob





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