Code 45 - Oxygen Sensor-Rich Fuel Mixture

NOTE: A restricted air cleaner can cause a Code 45.

Disconnect oxygen sensor connector. With ignition ON and engine stopped, check for repeated clicks from duty solenoid.
If there are repeated clicks, repair carburetor. If no repeated clicks are heard, replace duty solenoid.

Fig 1: Code No. 45 Schematic, O2 Sensor-Rich Fuel Mixture

Courtesy of ISUZU MOTOR CO.

Fig 2: Code No. 45 Harness Diagram, O2 Sensor-Rich Fuel Mixture

Courtesy of ISUZU MOTOR CO.

Fig 3: Code No. 45 Flow Chart, O2 Sensor-Rich Fuel Mixture

Courtesy of ISUZU MOTOR CO.