Frequently Asked Questions

What is the most common reason for check engine light on a 2023 Lexus RX 350?

• Loose or faulty gas cap leading to an evaporative emissions fault.
• Faulty oxygen sensor or catalyst issues increasing emissions and fuel use.
• Ignition misfires from worn plugs or coil problems that can damage the catalytic converter if untreated.
• Mass airflow sensor faults causing drivability and economy loss.
• Bringing the vehicle to Nalley Lexus Roswell often costs less than independent shops, while offering factory-trained technicians and long-term savings through correct repairs.

How much does a check engine light diagnostic cost for a 2023 Lexus RX 350?

• Diagnostics at our dealership are competitive and transparent; prices vary by issue but usually include a thorough scan and inspection.
• We often cost less than independent shops thanks to efficient processes and OEM tooling, providing immediate and long-term savings.
• Any repairs covered by warranty must be performed at a certified dealership to preserve coverage and receive authorized parts and labor.
• We provide an estimate before repairs so you can decide with confidence.

What does it mean when the check engine light comes on in a 2023 Lexus RX 350?

• The lamp signals a fault detected by the engine control system — from emissions to ignition or fuel systems.
• Codes stored in the vehicle help pinpoint problems like sensor failures, misfires, or emissions leaks.
• Some issues are minor and driveable; others require immediate attention to prevent damage or safety risks.
• Bring your RX 350 to Nalley Lexus Roswell for an OEM-level scan and repair recommendation from factory-trained technicians.

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

• Check the gas cap is tight and undamaged — a common, simple cause of the light.
• Observe vehicle performance: loss of power, rough idle, or strange noises indicate urgency.
• Schedule a diagnostic at our dealership; we use OEM scanners to read codes accurately and protect warranties.
• Certified repairs at Nalley Lexus Roswell often deliver lower total cost of ownership compared with independent shops due to correct parts and long-term reliability.

How long does a check engine light service take?

• Initial scan and code retrieval typically take 15–30 minutes.
• A full diagnostic, inspection, and estimate usually completes within 1–2 hours depending on complexity.
• Simple repairs may be same-day; more complex issues can take longer if parts are required.
• Choosing Nalley Lexus Roswell delivers efficiency and accuracy from factory-trained techs, saving time and preventing repeat visits.