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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 51 (Engine Control System - Self-Diagnostics - 4.2L) >> Diagnostic Tests >> DTC P1514: Airflow Rate Excessive >> 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. 5

    This step will determine if the manifold absolute pressure (MAP) sensor voltage is within the proper range at idle.

  2. 6

    This step will determine if the MAP sensor responds properly to the change in manifold pressure.

  3. 7

    A throttle blade that sticks or binds may set this code. Opening the throttle through the entire range will indicate problems such as these.

  4. 9

    When the PCM detects a condition within the ETC system other DTCs may set due to the many redundant tests run continuously on this system. Locating and repairing 1 individual condition may correct more than 1 DTC. Keep this in mind when reviewing captured DTC info.

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