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Home >> GMC >> 1996 >> Forward Control 4.3 W >> Repair and Diagnosis >> External Pages >> Different car >> Section 126 (Engine Controls - Tests W/Codes - 4.3L) >> Trouble Code Charts >> Code 45, Rich Exhaust Indication - All Models >> MAP Sensor

MAP Sensor

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If control module senses higher than normal manifold pressure (low vacuum) system can go rich. Disconnecting MAP sensor allows control module to substitute a fixed value for MAP sensor. If rich condition disappears, replace MAP sensor and continue testing.

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