My 96 Windstar w/108K throws a P0402 code whenever I get very low on fuel - could this be related to a small leak in the fuel filler cap? It only happens with low fuel levels, not when there is a reasonable amount of fuel in the tank.
I've had a auto parts guy tell me it has to do with the EVAP system and pulling too many fumes from the canister, but I would have thought that would set a different code.
Any insight would be greatly appreciated!
bg