4.4.1 Description

This diagnostic monitors the long-term adaptions of the fuel system. If the adaptions exceed calibrated thresholds for a calibratable time then an appropriate DTC will be recorded.

This monitor operates continuously provided the entry conditions have been met. Any of the components that make up the fuel system and are individually monitored, like the oxygen sensors, fuel pressure sensor and fuel delivery system, must also themselves be in working order with no faults. The general operation of the monitor is shown below.