M maxima New Member Oct 5, 2004 146 0 0 Sep 29, 2007 #1 Sep 29, 2007 #1 my check engine light was on ,and plugged my programmer in and it gave me a code of PO456, evap ctrl system small leak , is that bad ? and what is it ? thanks for the info
my check engine light was on ,and plugged my programmer in and it gave me a code of PO456, evap ctrl system small leak , is that bad ? and what is it ? thanks for the info
SpartaPerformance 10 Year Member Nov 5, 2006 2,517 61 89 Long Island NY Sep 29, 2007 #3 Sep 29, 2007 #3 Run a system check from your cluster "odometer" and see if your gas cap is not tightened properly.