Code 43 check engine light

1993 CHEVROLET SUBURBAN
300,000 MILES • 5.7L • V8 • 2WD • AUTOMATIC
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JOHN CAMERON
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I have had the knock sensor replaced which is on the block next to starter. put a meter on it after, but still the check engine light comes on and as well as code 43. i have tried everything.
Mar 28, 2019 at 11:51 AM
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SEVAG P
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Hello thanks for using 2CarPros.

For the fault code 43 it seems you have wiring issue because you already replaced the sensor, check fig 1 for trouble shooting, and fig 2 to check the wire from engine management to knock sensor.

Use our guide how to check wiring:
https://www.2carpros.com/articles/how-to-check-wiring.

Please send us feed back what happens with you.
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Mar 28, 2019 at 12:32 PM