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Home >> Chevrolet >> 1995 >> Corvette Base, 2D Convertible, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes >> ECM/Pcm Code Charts >> Code 91, 1-4 Upshift Light >> Diagnostic Aids

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Diagnostic Aids

Inspect harness and all related connections, including PCM connections. These may cause an intermittent code to set.

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