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Q can a battery cause a check engine light
HeddaHerty
StevenHousman Release Time: July 3, 2024, 6:48 AM
Yes, a failing or low car battery can indirectly cause the check engine light (CEL) to illuminate. Modern vehicles rely heavily on their electrical systems for various functions, including the operation of sensors and the engine control unit (ECU). When a battery is weak or dying, it can lead to voltage fluctuations or insufficient power supply to these critical components. This, in turn, can cause abnormal signals or sensor readings that are outside the expected range, prompting the vehicle’s onboard diagnostic system to trigger the CEL as a warning of potential issues. It’s recommended to first check the battery’s condition and charging system if the CEL appears without an obvious cause. However, it’s also important to have a comprehensive diagnostic check to pinpoint the exact reason for the CEL, as it can indicate a wide range of engine and emissions-related issues.
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