What's the 2009 Toyota Corolla code p0354?

A P0354Code on the 2009 Toyota Corolla means that the ignition coil or coils are not functioning properly and that there is an electrical problem with them. The ignition coils are responsible for properly igniting the air-fuel mixture in the engine's combustion chambers. Ignition coils are known as compact electrical transformers. Their purpose is to take the low 12-volt current normally found in car batteries and convert it into a much higher voltage which is needed to ignite the fuel and start the engine.Each spark plug in a car has its own ignition coil. The average cost for ignition coil replacement is between $201 and $269. Labor costs are estimated between $55 and $69 while parts are priced between $147 and $201.