![]() If it’s an ignition coil issue, it’ll likely read engine light codes from Code P0350 to Code P0362, depending on the faulty cylinder in your car.įor example, if there’s an issue in your first cylinder’s ignition coil or circuit, the OBD 2 code scanner will read Code P0351 (Ignition Coil ‘A’ Primary/Secondary Circuit Malfunction). So if your car supports the OBD 2 system, use an OBD 2 code scanner or a multimeter to confirm what’s wrong. Remember that the Check Engine light can light up for many reasons, like a bad catalytic converter, a bad spark plug, or a loose fuel cap. It often illuminates when there’s a faulty ignition coil. ![]() The Check Engine Light Turns onĪnother sign of a bad ignition coil is the Check Engine light. So, RPM fluctuations while driving or unusual engine sounds can point to ignition coil failure. These vibrations are gentler than misfires however, they can shut down your running car in severe cases.Īll of this is due to a bad coil generating power at irregular intervals - causing the fuel to burn inconsistently. Sometimes, your car may have tiny vibrations when parked. Rough Idlingīad ignition coils can also cause your car to run unsteadily at different RPMs (revolution per minute), even without your foot on the gas. To confirm, get your car checked out by a mechanic. As a result, you may find it difficult to start your car if multiple coils malfunction.Ĭar starting issues are common for many malfunctions, including a poor ignition coil connection or an electronic control module (ECM) issue. Trouble Starting The CarĪ failed ignition coil doesn’t deliver the required voltage for spark plugs to ignite the air and fuel mixture. So get your car checked out if your engine misfires. ![]() Note : Misfires can affect the engine performance and damage engine components like the catalytic converter. As a result, a cylinder may fire incorrectly - causing spluttering or coughing noises. Misfiring EngineĪ bad ignition coil may cause your car to misfire while accelerating or, worse, stop your car while driving.Ī misfire happens when a failing ignition coil generates an inconsistent voltage, affecting the spark plug and the combustion. Here are some common signs of a faulty ignition coil: 1. 5 Signs You Need An Ignition Coil Replacement ![]()
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