Vehicle Questions and Answers
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In a 2009 Toyota Corolla, when the P0354 code pops up, it indicates that the ignition coil or coils are not working properly, which suggests an electrical issue. These coils are crucial for sparking the air-fuel mixture in the engine's combustion chambers. Ignition coils function as mini transformers, converting the standard 12-volt battery current into a higher voltage required to kickstart the engine. Each spark plug in a car comes with its own ignition coil. On average, replacing an ignition coil can cost between $201 and $269, with labor around $55 to $69 and parts ranging from $147 to $201.
In 2009, if you see a P0354 code on your Toyota Corolla, it indicates an electrical issue in the ignition coil "d" circuit, either in the primary or secondary part.