Thread: E420 P0455
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  #9  
Old 03-11-2008, 04:25 PM
okc329 okc329 is offline
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Join Date: Feb 2002
Location: St. Louis, MO
Posts: 340
Can't explain any correlation to fuel additive, but ...
why don't you try treating the purge valve with WD40 as I described above. I've been running without P0455 error for 9 months since I did.
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