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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 438 (Engine Control System - Self-Diagnostics - 5.3L) >> Diagnostic Tests >> DTC P0106: Map System Performance >> Test Description

Test Description

WARNING: This page is about a different car, the 2003 GMC Envoy XL and 2003 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 in the diagnostic procedure.

  1. 4

    This step tests the MAP sensors ability to correctly indicate Barometric (BARO) pressure.

  2. 6

    This step tests the MAP sensors ability to respond to an increase in engine vacuum.

  3. 8

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

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