Test Description
WARNING: This page is about a different car, the 2003 GMC Savana and 2003 Chevrolet Chevy Express. However, it is still accessible from the selected car via links, so may be relevant.
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A short to voltage on the signal circuit of the Manifold Absolute Pressure (MAP) sensor will backfeed through the sensor into the 5-volt reference circuit and set this DTC.