What are the common symptoms of a failing ignition coil in the Toyota Prius?

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What are the common symptoms of a failing ignition coil in the Toyota Prius?

A faulty ignition coil can cause engine misfires, rough idling, loss of power, sputtering, poor fuel efficiency, and the Check Engine Light CEL turning on. Discussing these symptoms can help Prius owners detect issues early.

Zarnish asked on 13 Feb 2025 16:02:04 pm

1 Answer

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Car Mechanic Expert - on 13 Feb 2025 16:24:53 pm

A failing ignition coil can cause the following symptoms:

Engine Misfires: The ignition coil is responsible for providing high voltage to the spark plugs. If it’s not working properly, the engine can misfire, causing rough performance.
Rough Idling: The car may idle roughly o r feel shaky when at a stop, indicating incomplete combustion.
Loss of Power: A failing ignition coil can cause a noticeable loss of engine power, especially when accelerating.
Sputtering: The engine may sputter o r hesitate during acceleration due to misfires.
Poor Fuel Efficiency: A faulty ignition coil leads to inefficient combustion, which can reduce fuel economy.
Check Engine Light CEL: The CEL may turn on due to misfires o r other related issues caused by the ignition coil.

Recognizing these symptoms early can help prevent more serious engine problems.