Frequently Asked Questions

What is the most common reason for check engine light on a 2019 Hyundai NEXO?

• Most often the light signals a sensor or emissions-monitoring fault—examples include air/fuel sensors or hydrogen-system sensors detecting abnormal readings.
• Sensors are inexpensive to diagnose and often simple to replace; leaving them unchecked can escalate to more complex issues that affect range and performance.
• Nalley Hyundai’s factory-trained technicians diagnose with OEM tools to isolate the real cause quickly, often costing less than independent shops while delivering superior long-term value.
• Any repair covered under warranty must be performed at a certified dealership to preserve coverage and ensure genuine parts and calibration.

How long does a check engine light service take?

• Initial diagnostic scan typically takes 30–60 minutes with dedicated OBD and manufacturer-level tools used at our service center.
• Simple repairs (sensor swaps, resets) can often be completed the same day; more extensive work (emissions components or fuel cell-related repairs) may require parts and additional time.
• We provide clear time estimates up front and prioritize safety — if the light is flashing, immediate attention is required and we’ll expedite evaluation and repairs.
• Scheduling service with Nalley Hyundai often yields immediate and long-term savings because our technicians use factory procedures that prevent repeat visits and preserve warranty coverage.

What does it mean when the check engine light comes on in a 2019 Hyundai NEXO?

• The light is a general alert that the vehicle’s onboard diagnostics has detected an issue—from minor sensor faults to emissions or hydrogen system irregularities.
• It may indicate degraded range, reduced efficiency, a need for calibration, or a component needing replacement depending on the stored trouble code.
• For safety and warranty reasons, Nalley Hyundai recommends a prompt diagnostic so our factory-trained team can verify whether a repair is required and whether it is covered by warranty.
• Ignoring the light can lead to higher repair costs and diminished vehicle performance; certified dealership service protects both your vehicle and your long-term ownership costs.

How much does a check engine light diagnostic cost for a 2019 Hyundai NEXO?

• Diagnostic fees vary; many customers see diagnostics start near typical service rates for modern vehicles—Nalley Hyundai provides transparent pricing and written estimates before any repairs.
• Our dealership often costs less than independent shops overall because OEM diagnostics, accurate repairs, and genuine parts reduce repeat work and maximize long-term savings.
• If the repair is covered by warranty, it must be completed at a certified dealership to qualify; we handle warranty verification and perform covered repairs at no unexpected cost to you.
• We encourage scheduling a diagnostic appointment online at nalleyhyundai.com or visiting our service specials page for current offers: /specials/service.htm.

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

• Note dash messages—if the check engine light is flashing, pull over safely and schedule immediate inspection with our service team to avoid damage.
• Check for obvious alerts: messages, reduced range warnings, or hydrogen-system notifications; do not ignore system warnings on a fuel-cell vehicle.
• Contact Nalley Hyundai to book a fast diagnostic; our factory-trained technicians have the right tools to read manufacturer codes and determine whether a simple fix or more involved repair is needed.
• Remember: performing covered repairs at a certified dealership preserves warranty protection and provides long-term cost advantages over piecemeal fixes.