Quote:
Originally Posted by KatmanII
I think I found a cure for the P0456 code that always came on when the tank was between 1/4 to 1/2 full. I dabbed a little silicone lube on the gas cap threads and it hasn't came on since the last two tank fulls. The lube lets me tighten the cap just a tiny bit more which seems to do the trick.
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That sounds like faulty gas cap. Make the dealer replace it. Should be a warrenty fix. Specially since you have already identified the problem.