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Home >> GMC >> 1991 >> Forward Control 7.4 N >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes - Gasoline >> Trouble Code Charts >> Code 45, Rich Exhaust Indication (Except 4.3L Turbo) >> TPS

Code 45, Rich Exhaust Indication (Except 4.3L Turbo): TPS

An intermittent TPS output will cause the system to operate rich due to a false indication of engine acceleration.

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