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Code 44 - O2 Sensor - Lean Fuel Mixture

NOTE: Test numbers refer to test numbers on diagnostic chart.

This step determines if O2 sensors signal to ECM is lean.
This step determines if O2 sensor wires are grounded.

Fig 1: Chart 44 - Schematic

Courtesy of ISUZU MOTOR CO.

Fig 2: Chart 44 - Harness Diagram

Courtesy of ISUZU MOTOR CO.

Fig 3: Chart 44 - Diagnostic Flowchart

Courtesy of ISUZU MOTOR CO.