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Diagnostic Aids

Vacuum switch in EGR solenoid is not used. If EGR valve sticks open, a rough idle will result. If EGR solenoid vent filter becomes plugged, EGR valve will remain open or close slowly. An inoperative check valve in ported vacuum supply line will result in faulty EGR system operation.

Fig 1: CODE 32, Schematic, EGR System Error (4.3L Turbo)
G91F13743
Fig 2: CODE 32, Flowchart, EGR System Error (4.3L Turbo)
G91I13712
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