Enhanced and Non Enhanced Evap System

by Carlos Rodriguez-Iniguez
(Whittier Ca 90603 USA)

Non enhanced system are basically at the beginning of obd 2 system , 1996-1997 year model vehicles, and can be identify by a purge vapor flow and no readiness monitors system.

Enhanced system were required on all 1998 and newer model vehicles, this system can detect purge flow and system leaks by using a variety of sensors and switches.and some system can test with key off. and all systems include readiness monitor.

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