Frequently Asked Questions

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

• Emission or sensor faults are frequent triggers—oxygen, temperature, or pressure sensors can report anomalies that illuminate the light.
• Hydrogen fuel cell system warnings or related sensor errors are specific to the 2026 Hyundai NEXO and should be diagnosed promptly.
• Software or control-module updates occasionally generate codes that require dealer-level tools to clear and verify.
• Addressing issues early with Nalley Hyundai saves money immediately and long term by avoiding cascading failures and higher repair costs.
• Warranty-covered repairs must be performed at a certified dealership to preserve coverage and ensure proper parts and procedures.

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

• It signals the vehicle’s diagnostic system has detected a fault—ranging from a minor sensor reading to a critical fuel-cell or emissions issue.
• It may be a maintenance reminder, a logged error code, or a sign of a system needing immediate attention.
• Nalley Hyundai’s factory-trained technicians use OEM diagnostic tools to pinpoint the cause quickly and recommend the right repair path.
• Choosing our dealership often costs less than independent shops while delivering higher-level service and warranty-compliant repairs.
• If the issue is covered by warranty, repairs must be completed at a certified dealership to maintain coverage and ensure genuine parts.

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

• Check the instrument cluster for any accompanying warnings or messages that indicate system severity.
• Look for obvious issues—strange noises, loss of power, or fluid leaks—and avoid driving if the vehicle behaves unsafely.
• Schedule a diagnostic with Nalley Hyundai so our technicians can read codes with OEM tools and confirm whether a simple reset or immediate repair is needed.
• Prompt dealer diagnosis often prevents larger repairs and delivers better long-term savings than deferring service.
• Remember: warranty repairs must be completed at a certified dealership to remain valid and ensure correct repair procedures.

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

• Diagnostic fees vary by issue, but Nalley Hyundai provides transparent pricing and efficient diagnostics using OEM scan tools.
• Many initial diagnostics are competitively priced and often cost less than independent shops while delivering factory-trained expertise.
• Early diagnosis at our dealership can produce immediate savings by avoiding additional damage and long-term savings through correct repairs the first time.
• If a repair is covered under warranty, it must be done at a certified dealership to keep coverage intact and use genuine parts.
• Contact our service team or schedule online to confirm current diagnostic rates and available service specials.

How long does a check engine light service take?

• Simple diagnostics and resets can take under an hour; complex issues involving parts or fuel cell components may require additional time.
• Nalley Hyundai prioritizes efficient workflows—factory diagnostic tools and trained technicians reduce time to repair compared with many independents.
• If parts are needed, our team will provide a clear timeline and explain how timely dealer service prevents prolonged or repeated visits.
• Choosing the dealership often leads to faster, more reliable repairs and long-term savings by preventing compounding failures.
• For warranty work, repairs must be completed at a certified dealership to maintain coverage and ensure OEM procedures are followed.