on December 8, 2009, 6:57 pm, in reply to "Toyota Avensis 1.8 2003 - Fault code P0420 #"
its unlikely but an intermittent misfire can trigger this code but more likely to need reflashing which i would assume increases tolerances.
good luck
colin
Message Thread 
Toyota Avensis 1.8 2003 - Fault code P0420 # - Keith Brown December 8, 2009, 4:13 pm
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