LEMON Manuals: Even more car manuals for everyone
Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 106 (Engine Controls Self-Diagnostics - 2.2L CNG) >> Diagnostic Tests >> DTC P1203: Actual Gas Flow Signal Circuit Frequency High >> Test Description

Test Description

WARNING: This page is about a different car, the 2002 Chevrolet Cavalier. However, it is still accessible from the selected car via links, so may be relevant.

The number below refer to the step number on the diagnostic procedure.

  1. 2

    This step determines if the high frequency condition is present.

  2. 4

    This step determines if the proper voltage is available to the Gas Mass Sensor/Mixture Control Valve (GMS/MCV).

  3. 5

    This step determines if the proper ground is available to the GMS/MCV.

  4. 6

    This step determines if the high frequency is being induced by a source other than the GMS/MCV.

  5. 7

    This step determines if excessively high CNG fuel pressure caused the GMS/MCV to produce a higher than normal frequency.

scientia non olet · About LEMON Manuals