Cold Start Emission Reduction Component Monitor: Notes

The Cold Start Emission Reduction Component Monitor was introduced for the 2006 MY on vehicles that meet the LEV-II emission standards. The monitor works by validating the operation of the components of the system required to achieve the cold start emission reduction strategy, namely retarded spark timing, and elevated idle airflow or VCT cam phasing.

The spark timing monitor was replaced by the Cold Start Emission Reduction System monitor in the 2007 MY. Changes to the OBD-II regulations, however, require having both a CSER system monitor and a CSER component monitor for the 2010 MY. The 2010 MY component monitor is not the same test that was introduced for the 2006 MY; rather, it has been redesigned.