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Code 43 check engine light

Tiny
JOHN CAMERON
  • MEMBER
  • 1993 CHEVROLET SUBURBAN
  • 5.7L
  • V8
  • 2WD
  • AUTOMATIC
  • 300,000 MILES
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.
Thursday, March 28th, 2019 AT 11:51 AM

1 Reply

Tiny
SEVAG P
  • MECHANIC
  • 405 POSTS
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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Thursday, March 28th, 2019 AT 12:32 PM

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