Quote:
Originally Posted by Rob175
Well...after getting a P0446 code on my 98 Boxster a couple of months ago I replaced the old gas cap with a new one after noticing the o-ring inside the cap has some cracks.
After the old cap was replaced and the CEL code cleared, I drove the car for the next couple of months assuming the problem was solved since the CEL never returned....UNTIL TODAY. As I was driving to its "winter storage" location the CEL P0446 returned.
Question: Can topping off the fuel (beyond the gas station's fuel pumps "auto-shut off") cause fuel to mess with the evaporative canister and trigger a CEL P0446 ??
(note: About a week ago I topped off the fuel tank in preparation for its winter storage and drove it for about 30 miles afterwards)
(note: The new cap is an OEM cap)
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P0446 has nothing to do with the gas cap, it is for the EVAP canister shut off valve function being below the lower flow limit. It indicates that the purge airline is blocked or the EVAP canister flow is blocked.
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