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Home >> Isuzu >> 1994 >> Pickup 2D Pickup Extra Cab >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes - CARBURETED >> Diagnostic Charts >> Code 13 - Open O2S Sensor Circuit

Code 13 - Open O2S Sensor Circuit

NOTE: If Codes 13 and 23 exist, start with Code 23.
NOTE: Test numbers refer to test numbers on diagnostic chart.
  1. This step checks if ECM can respond to lean O2S sensor signal (low voltage).
  2. This step determines if there is an open O2S wire or faulty ECM.
  3. This step checks for bad ground to ECM.
Fig 1: Chart 13 - Schematic
G91B17476Courtesy of ISUZU MOTOR CO.
Fig 2: Chart 13 - Diagnostic Flowchart
G91C17477Courtesy of ISUZU MOTOR CO.
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