Went to the store after our first snow of the year and ran out of power going up a small hill. Noticed the CEL was on and found codes P0299 and P0483. Disconnected the battery's and found that the filter (stock) was choked full of snow. Cleaned out the snow and then reconnected the battery's and still have the codes. The filter was still out as it needs to defrost and dry. Do I need to take it in to get the codes cleared or is there more problems I need to look at. Thanks.