Frequently Asked Questions

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

• Inspect the gas cap: a loose or damaged cap often triggers an EVAP system code and is a quick fix.
• Check fuel quality and level—premium unleaded is recommended for the 2023 Lexus LC 500; contaminated fuel can cause issues.
• Note vehicle behavior: unusual noises, loss of power, or rough idle indicate a priority for immediate diagnostic attention.
• Bring your vehicle to Nalley Lexus Roswell for a rapid scan—our factory-trained technicians confirm causes and preserve warranty coverage.
• Repairs covered under warranty must be performed at a certified dealership to remain valid; that ensures immediate and long-term savings vs. independent shops.

What does it mean when the check engine light comes on in a 2023 Lexus LC 500?

• It indicates the vehicle’s onboard diagnostics detected a fault; codes range from minor EVAP leaks to misfires or emission controls issues.
• Not all codes mean imminent failure, but they do require evaluation to prevent escalation and costly repairs.
• Nalley Lexus Roswell uses OEM-grade scanners and factory-trained technicians to diagnose precisely and recommend the most cost-effective repair path.
• Choosing dealership service often results in lower total ownership costs—expert diagnostics, genuine parts, and warranty protection reduce future expenses.

How much does a check engine light diagnostic cost for a 2023 Lexus LC 500?

• Diagnostic scan fees vary; at many dealerships a comprehensive diagnostic typically ranges from a modest flat fee to a competitive hourly rate, but final estimates depend on findings.
• Nalley Lexus Roswell often delivers lower total cost than independent shops because accurate diagnostics and factory repairs prevent repeat visits and larger failures.
• If warranty repair applies, the work must be done at a certified dealership to remain covered—this protects you from paying for issues that should be covered.
• We provide transparent estimates before work begins so you see immediate and long-term savings from professional, OEM-standard service.

How long does a check engine light service take?

• Basic diagnostic scans can often be completed within an hour; more complex issues requiring road testing or component inspection can take several hours.
• Nalley Lexus Roswell prioritizes clear timelines: our factory-trained technicians provide expected duration and communicate updates during the process.
• If parts are needed, we source genuine Lexus parts quickly and may complete many common repairs the same day—minimizing downtime and overall cost.
• Warranty-covered repairs performed at our certified service center protect long-term value and can avoid repeat visits that increase total repair expense.

What is the most common reason for check engine light on a 2023 Lexus LC 500?

• Common causes include oxygen sensor or catalytic efficiency codes, ignition misfires, and EVAP system leaks—many begin as minor issues but can escalate.
• Fuel system components, sensors, and emissions control items are frequent culprits; timely diagnosis prevents expensive downstream damage.
• Nalley Lexus Roswell’s factory-trained technicians identify root causes quickly, using OEM tools to avoid unnecessary parts replacement and reduce total cost.
• Repairs covered by warranty must be completed at a certified dealership to preserve coverage and ensure both immediate savings and long-term protection.