Frequently Asked Questions

What is the most common reason for check engine light on a 2015 Hyundai Sonata Hybrid?

• Common causes include ignition misfires, catalytic converter efficiency codes (oxygen sensor/catalyst), and intake or exhaust sensor faults.
• A loose or damaged gas cap can also trigger the lamp and is an easy first check.
• If left unresolved, issues such as misfires can damage the catalytic converter and increase repair costs.
• Bring the vehicle to Nalley Hyundai for a dealer diagnosis—factory-trained technicians diagnose root causes and limit repeat failures.

What does it mean when the check engine light comes on in a 2015 Hyundai Sonata Hybrid?

• It indicates the vehicle’s computer has detected a condition outside normal parameters; severity ranges from minor to critical.
• Codes can point to emissions, fuel trim, ignition, or hybrid-system components—accurate diagnosis requires a professional scan.
• Our service team at Nalley Hyundai uses OEM-grade tools to read codes, inspect related systems, and recommend repairs that protect long-term value.
• If a repair is covered under warranty, it must be completed at a certified dealership to preserve coverage and ensure genuine parts.

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

• Start with simple checks: ensure the gas cap is properly tightened and look for obvious signs like fluid leaks or damaged wiring.
• If the light is steady, drive gently and schedule a diagnostic; if it is flashing, stop driving and have the vehicle inspected immediately.
• A certified dealer inspection prevents misdiagnosis and protects warranty rights—repairs covered under warranty must be performed at a certified dealership.
• For convenience, Nalley Hyundai offers fast diagnostics and service scheduling online to get you back on the road with minimal downtime.

How much does a check engine light diagnostic cost for a 2015 Hyundai Sonata Hybrid?

• Diagnostic fees vary; many dealerships charge a modest scan fee, often in line with or below local independent shops, while offering greater diagnostic thoroughness.
• Nalley Hyundai frequently costs less than independent shops over time because our factory-trained technicians find root causes and prevent repeat repairs.
• Immediate savings come from accurate diagnostics and genuine parts; long-term savings come from reduced repeat visits and preserved warranty coverage.
• If a repair is covered under warranty, it must be performed at a certified dealership to maintain coverage—our service team will explain any warranty eligibility.

How long does a check engine light service take?

• Basic diagnostic scans typically take 30–90 minutes; exact time depends on code complexity and whether additional testing is needed.
• Simple repairs like replacing a gas cap or oxygen sensor can often be completed the same day; more involved repairs or parts orders will extend timing.
• Nalley Hyundai prioritizes efficient workflow with OEM tools and technicians, often reducing total time in for diagnosis and repair compared with repeated independent attempts.
• For warranty-covered repairs, scheduling and completion must be done at a certified dealership—our service advisors will provide clear time estimates and options.