Frequently Asked Questions

What is the most common reason for check engine light on a 2024 Lexus ES 300h?

• Loose or damaged gas cap causing an EVAP system error — a simple fix that often clears the code quickly.
• Oxygen sensor or catalytic converter issues, which affect fuel economy and emissions if left unaddressed.
• Ignition misfires from spark plugs, coils, or fuel system problems that can lead to more expensive engine or exhaust damage.
• Software or sensor calibration needs; our factory-trained technicians use Lexus tools to identify software-related alerts efficiently.
• Addressing the root cause at Nalley Lexus Smyrna delivers immediate and long-term savings; warranty-covered repairs must be completed at a certified dealership to remain protected.

What does it mean when the check engine light comes on in a 2024 Lexus ES 300h?

• It indicates the vehicle’s onboard diagnostics have detected a fault in the engine, emissions or drivetrain systems.
• Codes range from minor EVAP leaks to serious misfires; the light signals that further inspection is needed to avoid cascading failures.
• A steady light typically means a non-emergency issue; a flashing light signals immediate attention is required.
• Diagnostic scanning at our dealership pinpoints the exact trouble code and recommended repair using Lexus-specific software.
• Choosing Nalley Lexus Smyrna often costs less than independent shops when accounting for accurate diagnostics, genuine parts, and warranty protection that requires certified repairs.

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

• Check the gas cap: ensure it’s tight and undamaged — a loose cap is a common and inexpensive cause.
• Look for obvious signs: unusual noises, loss of power, smoke or warning icons that suggest a severe issue.
• If the vehicle runs normally, schedule a diagnostic scan as soon as practical to prevent long-term damage.
• If the light is flashing or performance is degraded, stop driving and have the vehicle towed to our service center to avoid further engine or catalytic converter damage.
• Repairs covered under warranty must be performed at a certified dealership to keep coverage valid; Nalley Lexus Smyrna provides factory-trained technicians and genuine parts for lasting value.

How much does a check engine light diagnostic cost for a 2024 Lexus ES 300h?

• Diagnostic fees vary by complexity, but our dealership provides transparent pricing and an accurate scope of recommended work after the scan.
• Minor diagnostics may be modest; addressing the underlying repair can range from small part replacements to more involved repairs.
• We emphasize immediate and long-term savings: correct diagnostics prevent repeat visits and protect major components like the catalytic converter.
• Nalley Lexus Smyrna often costs less than many independent shops when factoring in precise diagnostics, genuine parts, and factory-trained labor.
• Remember: warranty-covered repairs must be completed at a certified Lexus dealership to preserve benefits and ensure proper procedures.

How long does a check engine light service take?

• Basic diagnostic scans typically take 30–60 minutes, though total visit time varies with the issue discovered.
• Simple repairs, such as replacing a gas cap or sensor, can often be completed the same day.
• More complex repairs that involve parts ordering or in-depth engine work may require a longer turnaround; we provide clear timelines up front.
• Our factory-trained technicians and Lexus tools reduce diagnostic time and improve repair accuracy, delivering faster resolution and long-term value.
• When a repair is covered by warranty, work must be done at a certified dealership to maintain coverage—Nalley Lexus Smyrna handles warranty claims efficiently to minimize downtime.