Frequently Asked Questions

What is the first thing to check when the check engine light comes on for a 2026 Hyundai Sonata?

• Confirm whether the light is steady or flashing. A flashing light signals immediate attention.
• Check the fuel cap for a loose or damaged seal; a poorly seated cap often triggers an emissions code.
• Note any change in drivability—misfires, reduced power, rough idle, or stalling.
• Review the vehicle’s dashboard for related warnings (oil, battery, temperature).
• If in doubt, bring the 2026 Hyundai Sonata to Nalley Hyundai for a quick diagnostic; warranty-covered repairs must be done at a certified dealership.

What does it mean when the check engine light comes on in a 2026 Hyundai Sonata?

• It indicates the vehicle’s onboard computer detected a fault in emissions, fuel, ignition, or sensors.
• Causes range from minor (loose gas cap) to serious (misfire, catalytic converter damage).
• Ignoring the light can reduce fuel economy, increase emissions, and risk more costly repairs.
• Our factory-trained technicians at Nalley Hyundai use OEM diagnostic tools to identify the exact code and recommend repairs.
• Repairs covered under warranty must be completed at a certified dealership to preserve coverage and deliver long-term savings.

How much does a check engine light diagnostic cost for a 2026 Hyundai Sonata?

• Diagnostics at Nalley Hyundai typically start with a professional scan and inspection; base fees are competitive and transparent.
• We often cost less than independent shops, while offering OEM parts, factory-trained technicians, and warranty protection.
• Immediate savings include accurate diagnosis to avoid unnecessary parts; long-term savings come from repairs done right the first time.
• If repairs are covered under warranty, they must be completed at a certified dealership to maintain coverage and avoid future expense.
• Contact Nalley Hyundai for a specific quote based on the code and required repairs.

How long does a check engine light service take?

• Initial diagnostic scans and a basic inspection typically take 30–90 minutes, depending on symptoms and code complexity.
• Simple fixes—tightening a gas cap or clearing codes—can be completed the same day.
• Repairs that require parts or deeper diagnosis, such as oxygen sensors or catalytic work, may take longer; we provide clear time estimates upfront.
• Our streamlined scheduling and parts network help minimize downtime and often deliver faster service than independent shops.
• Warranty repairs must be performed at a certified dealership; this ensures proper documentation and long-term savings.

What is the most common reason for the check engine light on a 2026 Hyundai Sonata?

• A loose or faulty gas cap and evaporative emissions faults are frequent, low-cost causes.
• Other common reasons include oxygen sensor failure, ignition misfires, and catalytic converter issues.
• Left unresolved, minor issues can escalate to costly repairs and reduced fuel economy.
• Nalley Hyundai’s diagnostics identify root causes quickly, preventing unnecessary expense and protecting warranty rights.
• For covered repairs, certified dealership service preserves warranty benefits and delivers better long-term value than piecemeal fixes.