EVAP problems are a real pain. I could be so many things that it's hard to pin it down. The system detects very small leaks that could be anywhere. An Isuzu mechanic with the Tech2 scan tool is the best way to find problems.



I have an Isuzu tech video for EVAP concerns that may give you a headache when you see how this system works. The P0440 code is mentioned in the vid. I believe you need a RealPlayer to view it.


23.2 MB, 12:58 - http://www.drivehq.com/file/df.aspx/publish/mgpa/techvids/evap.rm

Mark Griffin