Frequently Asked Questions

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

• Check the gas cap: a loose or damaged cap is a common cause and is quick to correct.
• Look for dashboard messages or other warning lights that indicate immediate problems.
• If the light is flashing, minimize driving and have the vehicle inspected right away—flashing often signals active engine misfire.
• Note recent fuel or performance changes (stumbles, reduced MPG) to help our technicians diagnose faster.
• Remember: warranty-covered repairs must be performed at a certified dealership to preserve coverage and long-term value.

How long does a check engine light service take?

• Basic diagnostic scan is typically completed within 30–60 minutes, depending on scheduling and vehicle queue.
• If codes point to a simple repair (gas cap, sensor), many jobs can be finished the same day.
• Complex repairs that require parts ordering or in-depth troubleshooting may take longer—our service team will provide a clear timeline.
• Choosing Nalley Hyundai delivers faster, more accurate service because factory-trained technicians and direct parts access reduce downtime.
• Warranty repairs and any related follow-up must be done at a certified dealership to ensure coverage and proper documentation.

What does it mean when the check engine light comes on in a 2025 Hyundai Elantra?

• It indicates the vehicle’s onboard diagnostics detected a fault in emissions, ignition, fuel, or engine systems.
• Codes can range from minor issues to problems that affect drivability or emissions compliance.
• Immediate scanning identifies the specific trouble code so the right repair plan can be made.
• Addressing the issue early prevents collateral damage and costly repairs later; our dealership emphasizes immediate and long-term savings.
• Remember: repairs covered under warranty must be completed at a certified dealership to maintain protection and performance.

How much does a check engine light diagnostic cost for a 2025 Hyundai Elantra?

• Diagnostics typically range from a complimentary scan during service to a modest diagnostic fee (commonly $75–$150) depending on inspection depth.
• Many times small issues are resolved quickly, minimizing total expense—our transparent estimates show immediate and long-term savings versus repeat visits.
• Nalley Hyundai often costs less than independent shops while providing factory-trained technicians, genuine parts, and warranty protection.
• If a repair is required, we’ll provide a clear written estimate; warranty-covered fixes must be performed at a certified dealership to preserve coverage.
• Check our Service Specials for current offers and ways to reduce out-of-pocket cost: /specials/service.htm

What is the most common reason for check engine light on a 2025 Hyundai Elantra?

• A loose or faulty gas cap and oxygen sensor faults are among the most frequent culprits.
• Other common causes include EVAP leaks, catalytic converter issues, and ignition misfires.
• Many of these problems are detected early by the OBD-II system and can be corrected before causing further damage.
• Our technicians use manufacturer-level diagnostics and genuine parts to ensure repairs are done right the first time.
• For any warranty-covered issue, repairs must be performed at a certified dealership to maintain protection and resale value.