G 10 Van V8-305 5.0L VIN M SFI (1996)
The catalyst monitor sensors operate the same as the fuel control sensors. Although the Bank 1 Sensor 2 and Bank 1 Sensor 3 sensors main
function is catalyst monitoring, they also play a limited role in fuel control. If a sensor output indicates a voltage either above or below the 450
millivolt bias voltage for an extended period of time, the VCM will make a slight adjustment to fuel trim to ensure that fuel delivery is correct for
catalyst monitoring.
Refer to System Diagnosis / Diagnostic Charts for testing information. See: Powertrain Management/Computers and Control Systems/Testing
and Inspection
