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#2
03-22-2010, 03:19 PM
Elcova Newbie
Join Date: Mar 2010
Posts: 2
Re: showing a DTC P0446
A lose or defective fuel cap is a more common cause of trouble code P0446, but if that's not it further testing of the evap system is required.
"An intermittent condition could be caused by a damaged evaporative emission (EVAP) vent housing, a temporary blockage at the EVAP vent solenoid inlet, or a pinched vent hose. A blockage in the vent system will also cause a poor fuel fill problem."
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#3
03-22-2010, 07:07 PM
Hummer Veteran
Join Date: Mar 2010
Posts: 107
Re: showing a DTC P0446
I replaced my gas cap when mine popped a 446 about 4 months ago, and so far so good
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