Frequently Asked Questions

What is the most common reason for check engine light on a 2024 Lexus NX 350?

• Loose or damaged gas cap — a sealed fuel system fault is an easy fix and often the first cause to rule out.
• Oxygen sensor or catalytic converter issues — poor fuel economy and emissions can follow if ignored.
• Ignition misfires (sparks, plugs, coils) — continued driving with misfires risks engine and catalytic converter damage.
• Modern diagnostics at Nalley Lexus Roswell identify root causes quickly with factory-level tools to avoid unnecessary repairs.
• Remember: warranty-covered repairs must be completed at a certified dealership to preserve coverage and long-term savings.

How long does a check engine light service take?

• Typical diagnostic scans range from 30 minutes to 1 hour to read codes and perform initial inspection.
• Simple fixes like tightening a gas cap or replacing a sensor can often be completed the same day.
• More involved repairs (ignition, catalytic work) may take several hours to a full day depending on parts availability.
• Nalley Lexus Roswell uses factory-trained technicians and direct parts sourcing to minimize downtime and provide lower total cost than many independent shops.
• For warranty claims, repairs must be done at a certified dealership — preserving coverage and long-term value.

What does it mean when the check engine light comes on in a 2024 Lexus NX 350?

• The light indicates the vehicle’s onboard diagnostics detected a fault — from emissions to engine performance.
• It can signify minor issues like a loose gas cap or more serious problems like misfires, fuel system faults, or emissions control failures.
• A steady light usually means a non-emergency issue; flashing indicates immediate attention is required to avoid damage.
• Our dealership uses OEM diagnostic tools to pinpoint the exact code and recommend the most cost-effective repair path.
• Any warranty-covered fixes should be performed at a certified dealership like Nalley Lexus Roswell to ensure proper parts, procedures, and coverage.

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

• Check the gas cap — it’s the most common and easiest to correct cause; tighten it securely and see if the light clears.
• Scan for trouble codes — many auto parts stores or our service center can pull codes to identify the issue.
• Look for other dashboard warnings, unusual noises, or performance changes (loss of power, rough idling).
• If the light is flashing or you notice severe symptoms, stop driving and contact Nalley Lexus Roswell immediately to avoid further damage.
• For warranty-covered issues, have repairs performed at our certified dealership to maintain coverage and maximize savings.

How much does a check engine light diagnostic cost for a 2024 Lexus NX 350?

• Diagnostic fees can vary by complexity, but typical dealer diagnostics often range from modest scan fees to higher investigative costs if live data or road testing is required.
• Nalley Lexus Roswell frequently costs less than independent shops overall because we combine accurate diagnosis, OEM parts, and factory-trained technicians to prevent repeat repairs.
• Immediate savings come from correct first-time repairs; long-term savings come from preserving warranty and using parts that last longer.
• If a repair is covered under warranty, it must be performed at a certified dealership to keep coverage intact.
• Contact our service team or visit our Service Specials to learn current pricing and offers: Service Specials.