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Home >> GMC >> 1997 >> Forward Control 4.3 W, L35, Automatic >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 11 (Engine Controls - Tests W/Codes - 7.4L (P Series)) >> Diagnostic Trouble Codes >> DTC P0103 - MAF Sensor Circuit High Frequency >> Diagnostic Aids

Diagnostic Aids

WARNING: This page is about a different variant/trim than selected.

Inspect VCM connectors for backed-out terminals, improper mating, broken locks, improperly-formed or damaged terminals and poor terminal-to-wire connection. Inspect MAF sensor harness routing to ensure it is not too close to high-voltage wires such as spark plug leads. Inspect wiring harness for damage. If harness is okay, observe scan tool while wiggling MAF sensor related connectors and wiring harness. A change in display will indicate location of fault.