Frequently Asked Questions

What is the first thing to check when the check engine light comes on in a 2023 Lexus LC 500 Convertible?

• Check for obvious issues first: a loose or damaged gas cap can trigger the light and is a quick, low-cost fix.
• Look for immediate drivability symptoms: misfires, stalling, or a loss of power indicate higher priority repairs.
• Verify fuel type and recent service—this V8 requires premium unleaded; incorrect fuel or skipped maintenance can cause faults.
• Document any recent changes or repairs to help our technicians diagnose faster and reduce your time and cost.

How long does a check engine light service take?

• Initial diagnostic scan typically takes 30–60 minutes depending on code complexity and test needs.
• Simple fixes like tightening a gas cap or replacing a sensor can often be completed the same day.
• More involved repairs—such as ignition or catalytic converter work—may require parts ordering and can take a day or more.
• At Nalley Lexus Roswell, factory-trained technicians and streamlined workflows often reduce turnaround time while delivering longer-term savings.

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

• The light indicates the vehicle’s onboard diagnostics detected a fault in emissions, engine, or drivetrain systems.
• Problems range from minor sensor issues to serious misfires that can damage the engine if left unchecked.
• Prompt diagnosis at a certified dealership preserves warranties—any covered repairs must be performed at a certified Lexus dealer.
• Using Nalley Lexus Roswell often costs less than independent shops over time because we prevent cascading failures with accurate diagnostics and OEM parts.

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

• Diagnostics generally include a scan and inspection; prices vary but we provide transparent estimates up front.
• In many cases, the dealership’s diagnostics and OEM parts deliver immediate savings by avoiding repeat repairs that independent shops may miss.
• Long-term savings come from correct repairs the first time and preserved factory warranties—warranty-covered repairs must be done at a certified dealer.
• Ask about current service specials or maintenance coupons at Nalley Lexus Roswell to reduce out‑of‑pocket costs.

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

• Common causes include ignition misfires, oxygen sensor faults, catalytic converter efficiency codes, and EVAP system leaks.
• Sensors such as MAF or O2 wear over time; addressing them early avoids higher fuel costs and emissions failures.
• Our factory-trained technicians use OEM diagnostic procedures to pinpoint causes and prevent unnecessary parts replacement.
• Using Nalley Lexus Roswell often reduces total repair costs and protects your warranty because covered work must be completed at a certified dealership.