Frequently Asked Questions

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

• Intermittent engine misfires (spark plugs, ignition coils) are a frequent cause and can trigger codes like P0300.
• Fuel/air mixture issues — vacuum leaks or a dirty mass air flow sensor — also commonly illuminate the light.
• Evaporative emissions leaks (loose gas cap or EVAP system faults) are typical and inexpensive to fix when caught early.
• Addressing problems promptly at Nalley Hyundai often costs less than independent shops, with immediate savings from right-first-time repairs and long-term savings through preserved fuel economy and avoided major failures.
• Remember: any repairs covered under warranty must be performed at a certified dealership to maintain coverage.

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

• The light signals the vehicle’s onboard diagnostics have detected an issue — from minor emissions faults to engine misfires.
• It may indicate problems with ignition, fuel delivery, emissions control, or sensors like O2 or MAF.
• Our factory-trained technicians use Hyundai-specific scanners to read codes, diagnose root causes, and provide accurate repair estimates.
• Choosing Nalley Hyundai often yields lower overall cost than independent shops because OEM parts and calibrated repairs reduce repeat visits and long-term expenses.
• If the repair falls under warranty, the work 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?

• Confirm whether the light is steady or flashing — a flashing light can signal an urgent condition that requires immediate attention.
• Check the gas cap for tightness; a loose cap can trigger EVAP system codes and is simple to resolve.
• Note symptoms: rough idle, loss of power, or drivability issues to help technicians prioritize diagnostics.
• Bring the vehicle to Nalley Hyundai for a quick scan — our diagnostics are thorough, efficient, and often more cost-effective than independent repairs over time.
• Warranty-covered repairs must be handled by a certified dealership to remain valid; we’ll confirm coverage before performing work.

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

• Diagnostic pricing varies by the depth of testing; a basic scan is often very affordable and identifies the stored trouble codes.
• If additional testing is needed (road tests, component checks), we provide transparent estimates before any work begins.
• Nalley Hyundai frequently offers lower total costs than independent shops because our technicians diagnose precisely and use OEM parts to prevent costly repeat repairs.
• Immediate savings come from accurate diagnostics; long-term savings come from reduced downtime, improved fuel economy, and extended vehicle life.
• Keep in mind: repairs covered under warranty must be completed at a certified dealership to maintain coverage and ensure genuine parts.

How long does a check engine light service take?

• Simple scans and code reads are typically completed within 15–30 minutes during a service visit.
• Diagnostic time for complex issues varies — most thorough diagnostics and testing are completed the same day, but some repairs may require parts and additional time.
• Nalley Hyundai prioritizes efficient service with factory-trained techs and direct access to OEM parts, often reducing turnaround time compared with independent shops.
• We explain expected repair timelines up front, including any warranty checks — remember warranty repairs must be done at a certified dealership to preserve coverage.
• For appointments or faster service, schedule through our service specials page or contact our service team directly.