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Home >> Pontiac >> 2002 >> Aztek AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 50 (Engine Control System - Self-Diagnostics - 4.2L) >> Diagnostic Tests >> DTC P0105: Map System Performance >> Test Description

Test Description

WARNING: This page is about a different car, the 2002 Oldsmobile Bravada, 2002 GMC Envoy XL, 2002 GMC Envoy, and 2002 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.

The numbers below refer to the step numbers on the diagnostic procedures.

  1. 3

    This step tests the MAP sensor's ability to correctly indicate barometric pressure. The value shown for the MAP sensor varies with altitude. 103 kPa is the approximate Barometric (BARO) pressure displayed at or near sea level.

  2. 5

    This step tests the MAP sensor's ability to respond to an increase in engine vacuum.

  3. 6

    This step tests for a proper MAP sensor pressure with an applied vacuum.

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