Ford P0357 OBD-II Trouble Code Definition: P0357 Ignition Coil 7 Primary/Secondary Circuit Malfunction P0357 Ford OBD-II Trouble CodeDescription: OBD Trouble Code P0357 Ignition Coil “G” Primary/Secondary Circuit What does the code mean? OBD-ii Code P0357 definition: The COP (coil on plug) ignition system is what is used on most modern engines. There is an individual coil […]