The B2109 Code is related with the faulty engine and for solving the problem of the car engine, no part or component is necessary to be replaced with orientation to only a B2109 DTC. The car service manual should be checked for more data on possible reasons of the burden, along with obligatory difficult. Disconnected or fouled spark plugs is a common reason for engines that is why you cannot start. Spark plugs classically essential to be changed every period or 25 hours of use. The engineer can fix the problem of the car engine easily and you may need low cost to solve the problem.