Code 44 & 45 - Oxygen Sensor-Lean/Rich Fuel Mixture: Notes

NOTE: See wiring diagrams in 2.3L: WIRING DIAGRAMS - 2.3L , Pickup 2.6L: WIRING DIAGRAMS - 2.6L , Passport and Rodeo 2.6L: WIRING DIAGRAMS - 2.6L article 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)

Courtesy of ISUZU MOTOR CO.

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

Courtesy of ISUZU MOTOR CO.