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post #1 of 1 (permalink) Old 03-28-2019, 12:25 AM Thread Starter
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2008 cobalt P0651 code

Recently purchased 08 cobalt 2.2. Had running issues when purchased (currently shows engine power reduced on display) tach does not work as well. I know 5 volt reference is lost with P0651 but will this also cause tach to not work? I have checked wiring but found no issues as of yet. Any suggestions?
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