4.8.1 Description

When starting a cold engine, catalyst light-off times can be improved by retarding the ignition timing and increasing engine idle speed. Cold Start Monitoring ensures that the intended catalyst light-off times are being achieved. If the intended control is not achieved, then a DTC will be set and the MIL illuminated.

Fig 1: Cold Start Emission Reduction Monitoring (Diagnostic Trouble Codes P0506, P0507 - 1 Of 2)

Courtesy of JAGUAR CARS, INC.

Fig 2: Cold Start Emission Reduction Monitoring (Diagnostic Trouble Code P050B - 2 Of 2)

Courtesy of JAGUAR CARS, INC.