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Home >> Chevrolet >> 2001 >> Venture Base, Van Passenger >> Repair and Diagnosis >> External Pages >> Different car >> Section 71 (Engine Controls Self-Diagnostics - 2.2L CNG) >> Diagnostic Tests >> DTC P1202: Actual Gas Flow Signal Circuit Frequency Low >> Diagnostic Aids

Diagnostic Aids

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.
NOTE: Desired gas and actual gas circuits only output a frequency signal when engine is cranking or running on CNG. Frequency signal is NOT present with ignition ON and engine OFF or during any time vehicle is operating in gasoline mode.

A fault not present indicates the condition that caused the DTC to set is intermittent and not currently present. Refer to INTERMITTENT CONDITIONS  under SELF-DIAGNOSTIC SYSTEM. If any additional DTCs were stored, proceed to the applicable DTC. See DIAGNOSTIC TROUBLE CODE DEFINITIONS  .

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