Frequently Asked Questions

How much does a check engine light diagnostic cost for a 2023 Hyundai Sonata Hybrid?

• Typical diagnostic fees range from about $90 to $150 depending on the fault and whether additional tests are required.
• Nalley Hyundai often costs less than independent shops while providing factory-trained technicians, OEM parts and vetted repair procedures.
• Immediate savings come from accurate diagnosis and avoiding unnecessary repairs; long-term savings come from proper fixes that prevent repeat failures.
• If a repair is covered under warranty it must be performed at a certified dealership to preserve coverage and ensure genuine parts are used.
• We will provide transparent estimates before work begins and link costs to the required repairs so you can decide with confidence.

What is the first thing to check when the check engine light comes on in a 2023 Hyundai Sonata Hybrid?

• Start with the simplest checks: ensure the gas cap is tightened properly — a loose cap is a common trigger for the light.
• Look for other dashboard messages or reduced-power warnings; if the light is flashing, avoid driving and contact the dealer immediately.
• Note recent fuel, maintenance or performance changes so technicians can narrow the cause faster.
• Schedule a professional diagnostic at Nalley Hyundai so factory-trained techs can read trouble codes and recommend certified repairs.
• Remember: any repairs covered by warranty should be done at a certified dealership to maintain coverage and quality assurance.

What does it mean when the check engine light comes on in a 2023 Hyundai Sonata Hybrid?

• A steady light indicates a stored fault code; it can range from minor issues to components that need timely service.
• A flashing light signals an active misfire or condition that can damage the catalytic converter and requires immediate attention.
• The onboard computer stores a diagnostic trouble code; a full scan at Nalley Hyundai identifies the code and root cause.
• Dealership diagnosis provides accurate repair plans, OEM parts, and software updates that independent shops may not access as quickly.
• For warranty-covered issues, repairs must be performed at a certified dealership to preserve coverage and ensure proper documentation.

What is the most common reason for check engine light on a 2023 Hyundai Sonata Hybrid?

• The most frequent cause is a loose or faulty gas cap that triggers an EVAP system fault code.
• Other common causes include oxygen sensor faults, EVAP leaks, misfires, or catalytic converter efficiency codes.
• Hybrid-specific systems can also report faults related to battery or inverter sensors; these require hybrid-trained technicians to diagnose safely.
• Nalley Hyundai’s factory-trained staff can quickly identify common issues and recommend cost-effective, certified repairs to avoid escalation.
• Addressing problems promptly at our dealership saves money long-term by preventing collateral damage and maintaining warranty eligibility.

How long does a check engine light service take?

• Diagnostic scans often take 30–90 minutes depending on the complexity and whether drive-cycle tests are needed.
• Simple repairs (like a gas cap or O2 sensor) can sometimes be completed same day; more complex repairs may require parts ordering and extend service time.
• Nalley Hyundai streamlines service with OEM parts and factory-trained teams, helping many customers experience faster turnaround and reliable results.
• We provide clear time estimates when you arrive and notify you of any changes so you can plan accordingly.
• Warranty repairs must be performed by a certified dealership; handling them here eliminates rework and saves you time and future expense.