Frequently Asked Questions

What does it mean when the check engine light comes on in a 2018 Hyundai Sonata Plug-in Hybrid?

• It signals that the vehicle’s onboard diagnostics detected an emissions, ignition, fuel, or hybrid-system issue. In a 2018 Hyundai Sonata Plug-in Hybrid this can range from an EV-system warning to a fuel trim or catalytic converter alert.
• At Coggin Deland Hyundai in Deland, FL, our factory-trained technicians use OEM diagnostics to pinpoint the cause quickly — often saving you money versus independent shops by avoiding unnecessary repairs and protecting long-term reliability.
• Repairs covered under warranty must be performed at a certified dealership to remain valid; we’ll explain coverage, estimated costs, and long-term savings before any work begins.
• We offer service financing so you can get the needed repairs now and pay over time; to get started, please schedule service.

How long does a check engine light service take?

• Diagnostic time varies but most engine light scans and initial diagnostics for a 2018 Hyundai Sonata Plug-in Hybrid are completed within an hour; follow-up repairs depend on the findings.
• At Coggin Deland Hyundai we prioritize accuracy and speed — certified techs, OEM tools, and streamlined parts access minimize downtime for immediate and long-term savings.
• To plan around your schedule and view current offers, check our service specials and then schedule appointment online.

How much does a check engine light diagnostic cost for a 2018 Hyundai Sonata Plug-in Hybrid?

• Diagnostics at Coggin Deland Hyundai begin at approximately $93.45 for a thorough OBD-II scan and assessment. We strive to cost less than many independent shops while delivering factory-level service.
• Choosing the dealership often yields immediate savings from correct diagnosis, OEM parts that last longer, and covered warranty work that avoids future out-of-pocket expenses.
• We’ll provide transparent pricing and options; many customers pair diagnostics with current service specials or financing offers to make repairs more affordable.

What is the most common reason for check engine light on a 2018 Hyundai Sonata Plug-in Hybrid?

• Common causes include EV-system notifications specific to plug-in hybrids, oxygen sensor or catalytic converter issues, misfires, and evap leaks. Each carries different risks — from reduced fuel economy to catalytic damage if left unaddressed.
• Our technicians use factory diagnostics to separate hybrid-system alerts from conventional engine codes and recommend the most cost-effective repair plan to protect your vehicle’s longevity.
• Remember that warranty-covered repairs must be completed at a certified dealership to preserve coverage; we’ll review that with you when you schedule service.

What is the first thing to check when the check engine light comes on?

• Check for immediate safety issues: unusual noises, loss of power, or a flashing light. A flashing check engine light often indicates a severe misfire or catalytic risk and requires you to stop driving and have the vehicle inspected.
• Next, bring the 2018 Hyundai Sonata Plug-in Hybrid to Coggin Deland Hyundai for a prompt diagnosis; we’ll explain results, warranty implications, and cost-saving repair options.
• We provide service financing and transparent estimates, and you can always review our current service specials before you schedule appointment.