Air Flow Meter/Sensor: Testing and Inspection

Air Flow Meter Schematic (SPFI):

A faulty air flow meter will set code 23 in the on-board diagnostic system. Refer to the schematic diagram and test the meter with the diagnostic chart.

Wire color code identification:

L: Blue
B: Black
Y: Yellow
G: Green
R: Red
W: White
Br: Brown
Lg: Light green
Gr: Gray

Air Flow Meter Diagnostic Chart (SPFI):

Air Flow Meter Testing (SPFI):

AIR FLOW METER DIAGNOSTIC CHART