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02-14-2005, 01:35 PM
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#1 | |
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AF Newbie
Join Date: Aug 2004
Location: Scammon, Kansas
Posts: 3
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Code 43
I posted this on the Astro forum but didn't get any help. Thought I would give it a try over here.
Just rebuilt the engine in a 92 4.3L (C.P.I.) Astro, VIN = W. It has never had any codes set since I have had it. Now after the rebuild the "service engine soon" light is on with a code 43 (ESC Failure). It starts, runs, idles and advances great. When I rebuilt the engine I also replaced the knock sensor and O2 sensor with OEM parts. I checked the pick up coil to make sure it was okay and have checked for bad grounds. I am at a loss on where to go from here. If anyone has any pointers please help. Thanks |
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02-14-2005, 02:15 PM
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#2 | |
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Problem?
 
Join Date: Dec 2004
Location: Florida
Posts: 6,248
Thanks: 63
Thanked 114 Times in 94 Posts
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Re: Code 43
I thought a 43 was the knock sensor circuit.
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02-15-2005, 09:54 PM
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#3 | |
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AF Regular
 Join Date: Feb 2005
Location: indianola, Washington
Posts: 206
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According to my GM code book-code 43 is electronic spark timing (EST) circuit or electronic spark control (ESC) circuit problems.
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02-19-2005, 01:26 PM
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#4 | |
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Problem?
Join Date: Dec 2004
Location: Florida
Posts: 6,248
Thanks: 63
Thanked 114 Times in 94 Posts
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Re: Code 43
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