Code 44 - O2 Sensor - Lean Fuel Mixture

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

1. This step determines if O2 sensor signal to ECM is lean.
2. 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.