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What could be the reason for the check engine light turning on in my 2018 Volkswagen Atlas?
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In the Volkswagen Atlas, a check engine light can come on for various reasons, including a vacuum or emissions leak, such as a loose gas cap. More serious issues could involve a faulty O2 sensor or a failing catalytic converter. An O2 sensor monitors oxygen levels in the exhaust and plays a crucial role in the engine's air/fuel ratio. If fuel economy suddenly drops, the O2 sensor may need replacement. The catalytic converter helps convert harmful gases into less harmful ones but can get clogged or damaged over time. When the engine control unit detects abnormal emissions, the check engine light will be activated. Any disruption in these processes can trigger the check engine light in the Atlas.
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If the check engine light in the 2018 VW Atlas turns on, it could indicate various issues ranging from minor, such as a loose gas cap or a service reminder, to more serious problems like engine misfires or low oil pressure. Typically, whenever a problem is detected by the car's ECU, the light will illuminate. When this happens, you can use an OBD scanner to identify the exact issue by having the vehicle scanned.
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