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If your check engine light comes on, Carolina Mobile Auto Service in Winston-Salem provides fast and accurate diagnostics using advanced scan tools. Our ASE-certified technicians identify issues ranging from a loose or faulty gas cap to oxygen sensor problems or catalytic converter faults. Ignoring the light can lead to decreased fuel efficiency, higher emissions, and more costly repairs down the line. We go beyond simply reading codes—our technicians inspect affected components thoroughly and perform targeted tests to pinpoint root causes, ensuring reliable repairs that keep you safely on the road.