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It may be minor such as loose caps, or major such as a defective catalytic converter. The Check Engine Light is there for a reason. Fix the problem first before clearing the codes.Some guides use the terms Malfunction Indicator Lamp (MIL) or simply warning light. Different things like a faulty gas cap, dirty sensors, or an intake manifold leak can trigger a Check Engine Light (CEL). The check engine light appears on your dashboard when your car's ECU detects a problem. However, if you haven't corrected the trouble code, it's clear that it needs immediate attention. If the warning light persists, have your car checked with a professional mechanic, primarily if you have already worked on the trouble code previously identified. If it is still on, repeat the process for a second time. Turn your ignition on to check the warning lights.
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