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Isuzu
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1990
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Pickup 1 Ton, MSG5E
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Repair and Diagnosis
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Engine Performance
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System
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Engine Controls - Tests W/Codes - CARBURETED
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Trouble Code Charts
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Code 21 - Idle (Vacuum) Switch Or Map Sensor
Code 21 - Idle (Vacuum) Switch Or Map Sensor
Fig 1: Flow Chart - Code 21, Idle (Vacuum) Switch Or Map Sensor
Courtesy of ISUZU MOTOR CO.
Courtesy of ISUZU MOTOR CO.