Code 43--Car won't start. - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 02-28-2006, 02:35 PM   #1
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Default Code 43--Car won't start.

I have newly rebuilt the engine, but I am not getting spark. My computer is pullling a code 43. Electronic Spark Timing (EST) Circuit - low voltage detected. Any ideas what might be causing this? Any suggestions would be apprciated.
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Old 02-28-2006, 04:16 PM   #2
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Chuck, I don't really have specific help at this time, but have you made sure you have proper grounding? Have you checked all connections for corrosion?

Additionally,
Check connections at PCM and at harness connection points for: backed out harness connectors, improper mating, broken connector locks, damaged terminal ends, or poor connector to wire connections.
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Old 03-12-2006, 09:26 PM   #3
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I figured it out. After pulling the harmonic balancer, I had a bent tooth causing the sensor to read improperly. I'm one step closer.
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Old 03-12-2006, 09:32 PM   #4
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I was going to say crank sensor, so I was close.

Keep us updated. Get 'er runnin' again.
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