Ford P0351 OBD-II Trouble Code Definition: P0351 Ignition Coil 1 Primary/Secondary Circuit P0351 Ford OBD-II Trouble CodeDescription: OBD Trouble Code P0351 Ignition Coil “A” Primary/Secondary Circuit What does the code mean? OBD-ii Code P0351 definition: The COP (coil on plug) ignition system is what is used on most modern engines. There is an individual coil for […]