Code 44, 45 - Oxygen Sensor-Lean/Rich Fuel Mixture

NOTE: See appropriate WIRING DIAGRAM in WIRING DIAGRAMS  section for terminal and connector identification.

NOTE: Test numbers refer to numbers on diagnostic chart.

1. Measure voltage at oxygen sensor connector.
2. Jumper wire allows voltage measurement of circuit.

Fig 1: Code 44, 45 - Diagnostic Flowchart - 1 Of 2 (2.6L Passport)

Courtesy of ISUZU MOTOR CO.

Fig 2: Code 44, 45 - Diagnostic Flowchart - 2 Of 2 (2.6L Passport)

Courtesy of ISUZU MOTOR CO.