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Home >> GMC >> 2002 >> Yukon Denali >> Repair and Diagnosis >> External Pages >> Different car >> Section 343 (ENGINE CONTROLS - SELF-DIAGNOSTICS - 4.8L, 5.3L & 6.0L - Flex Fuel & Gasoline) >> Diagnostic Tests >> DTC P0106: Map System Performance >> Test Description

Test Description

WARNING: This page does not describe the selected car, but rather 13 other vehicles, including the 2003 Hummer H2, 2003 GMC Yukon XL, 2003 GMC Yukon, 2003 GMC Sierra, and 2003 GMC Cab & Chassis Sierra. 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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