Can this code/issue affect engine performance and what are possible solution to this?
May 24, 2014 at 6:28 AM
2003 Volkswagen Passat Code PO456 : EVAP Leak Small
ITSKEVN007
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This shouldn't have an affect on the performance. However, it is an emissions concern. There is a small leak in the EVAP system which is setting this code. What I recommend to have done is a smoke test. Basically, a mechanic will inject smoke into the EVAP system at a very low pressure. Where the leak is located, the smoke will come out. These are usually very hard to find without doing this procedure.
May 24, 2014 at 11:45 AM
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