Engine light illuminates to let you know that the vehicle's computer has found a fault with one of the systems.
P0455 indicates EVAP leak monitor large leak detected.
Possible causes are leaking EVAP system component or intermittent leak detection pump monitor failure. Delete engine trouble code and see if it reappears. If it does you will need to inspect vehicle's EVAP system including all hoses and connections.
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Monday, March 30th, 2009 AT 9:52 PM