I have a 1996 Ford Windstar. I am getting DTCs as follows: P0171-System to lean, Bank 1, freeze frame; P0174-System to lean, Bank 2; P0141-02 Heater Circuit, Bank 1, Sensor 2; and P0161-02 Heater Circuit, Bank 2, Sensor 2. Could these 4 codes all be related to the same ...