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Home >> GMC >> 1996 >> Forward Control 4.3 W >> Repair and Diagnosis >> External Pages >> Different car >> Section 137 (Engine Controls - Tests W/Codes - 7.4L) >> Trouble Code Charts >> Code 45, Rich Exhaust Indication >> MAP Sensor
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MAP Sensor

WARNING: This page does not describe the selected car, but rather 18 other vehicles, including the 1995 GMC Vandura Special, 1995 GMC Vandura, 1995 GMC Suburban, 1995 GMC Rally Camper Special, and 1995 GMC Rally. However, it is still accessible from the selected car via links, so may be relevant.

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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