is it MAF sensor or is it because I left car running at gas station

Question

On the way to work I got gas and left car running while pumping gas.i then left gas station to get on highway and car shut off..it started back up and it through a code..I had it scanned and it said bank one is lead?

Answer 1

P0171 Fuel trim lean Bank 1

Poor fuel quality can also set a P0171 which is lean condition, Over filling a fuel tank  can also set a P0171, Fuel expands as it in the fuel tank and can seep into its charcoal canister, choking the engine, For now just clear the code. If it happens again more investigation will be needed.