Check Engine Light Flashing

The sight of a flashing check engine light on your 2018 Hyundai Sonata Hybrid is a signal that immediate attention is required. A flashing light typically means the engine is misfiring, which can cause catalytic converter damage and further drivetrain issues if driven long distances. At Coggin Deland Hyundai in Deland, FL, our first priority is safety and damage limitation: we recommend pulling over when safe and contacting our service team for guidance. When you arrive, our factory-trained technicians use Hyundai-specific diagnostics to isolate ignition, fuel, or emissions-related faults and provide options that include OEM parts and guaranteed workmanship. We also make repairs approachable with clear estimates, available service financing, and targeted service specials to reduce out-of-pocket cost. Don’t risk long-term damage — our team can often diagnose and stabilize the vehicle the same day, preserving fuel economy and avoiding expensive downstream repairs. You can schedule appointment online to reserve a prompt inspection and get back on the road with confidence.

2018 Hyundai Sonata Hybrid Check Engine Light Reset

Resetting the check engine light on a 2018 Hyundai Sonata Hybrid may seem like a quick fix, but a reset without addressing underlying faults is only temporary. Coggin Deland Hyundai recommends a full diagnostic to ensure codes are interpreted correctly and repairs are performed with OEM parts and Hyundai-approved procedures. Our reset process is transparent: we scan, explain the stored codes in plain language, provide a recommended repair plan, and then reset the light only after verifying the condition is resolved. This approach prevents repeat visits and preserves warranty eligibility; note that warranty-covered repairs must be performed at a certified dealership to remain valid. Choosing our dealership means certified Hyundai technicians, genuine parts, and documented service history — all contributing to long-term vehicle reliability and resale value. We also offer service financing for eligible repairs and rotate current incentives through our service specials, helping customers manage cost while ensuring high-quality repairs. To protect your Sonata Hybrid’s systems and get a lasting resolution, please schedule service with Coggin Deland Hyundai today.

2018 Hyundai Sonata Hybrid Check Engine Light Codes

Understanding check engine light codes for a 2018 Hyundai Sonata Hybrid helps you prioritize repairs and avoid costly failures. Common codes we see at Coggin Deland Hyundai in Deland, FL include P0420 (catalytic converter efficiency), P0135 (oxygen sensor heater circuit), P0300 (random/multiple cylinder misfire), and P0455 (large EVAP system leak). Ignoring these codes can lead to degraded fuel economy, higher emissions, and expensive component damage — for example, a misfire left unchecked can ruin a catalytic converter, a repair that far exceeds the cost of timely diagnostics and sensor replacement. Our certified techs interpret codes within the full vehicle context, perform targeted testing, and recommend repairs using genuine Hyundai parts to ensure fit, performance, and warranty protection. We emphasize value: accurate diagnostics at Coggin Deland Hyundai reduces repeat work and delivers immediate and long-term savings. Check our current service specials and use our service financing options to manage cost. For a clear estimate and fast service, schedule service online and let our team restore your Sonata Hybrid’s reliability and efficiency.