Frequently Asked Questions

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

• Faulty oxygen sensor: reduces fuel efficiency and increases emissions; left unresolved it can damage the catalytic converter.
• Loose or damaged gas cap: a quick fix but can trigger the light until the system rechecks.
• Catalytic converter issues: costly if ignored—repairing early often prevents full replacement.
• Ignition system faults (spark plugs/coils): cause rough running and reduced performance; timely service prevents further engine wear.
• At Nalley Lexus Smyrna we diagnose these quickly and often deliver lower total cost than independent shops, with factory-trained technicians and genuine parts to protect long-term value.

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

• It signals the vehicle’s onboard diagnostics detected an emissions or engine system issue—ranging from minor to urgent.
• Codes describe the subsystem affected (fuel, ignition, emissions); a scan reveals the specific fault code and severity.
• A steady light typically indicates a non-emergency issue that still needs prompt attention to avoid bigger repairs.
• Any repairs covered under warranty must be performed at a certified dealership to maintain coverage—our service team handles warranty work efficiently.
• Choosing Nalley Lexus Smyrna often yields immediate and long-term savings versus independent shops because we use genuine parts and follow factory procedures.

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

• Check the gas cap: ensure it’s tight and undamaged—this simple step resolves many warnings after a short drive cycle.
• Note vehicle behavior: listen for odd noises, watch for reduced power, or fuel economy drops—report these to your technician.
• Scan for trouble codes: our certified technicians use Lexus-grade diagnostic tools to read stored codes and freeze-frame data.
• If under warranty, remember repairs must be performed at a certified dealership to preserve coverage; we process warranty diagnostics and repairs seamlessly.
• For transparency and savings, Nalley Lexus Smyrna explains recommended repairs, immediate cost-effective fixes, and long-term benefits of factory service.

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

• Typical diagnostic fees range by region, but at Nalley Lexus Smyrna we offer competitive pricing and service specials—often costing less than independent shops when you factor expertise and parts quality.
• Diagnostics identify the code and necessary repairs; prices for fixes vary from inexpensive (gas cap, sensors) to higher-cost items (catalytic converter, transmission work).
• Immediate savings come from accurate diagnosis and avoiding unnecessary parts replacement; long-term savings come from proper repairs using genuine Lexus parts.
• If a repair is covered by warranty, it must be completed at a certified dealership to retain coverage; we handle warranty claims and repairs directly for you.

How long does a check engine light service take?

• Basic diagnostics often take 30–60 minutes to read codes and perform initial checks; more complex issues require additional testing.
• Minor repairs such as replacing a gas cap or oxygen sensor can be completed the same day; major repairs may take longer depending on parts availability.
• We prioritize transparent timelines: our advisors provide estimated completion times and explain immediate versus recommended follow-up repairs.
• Warranty repairs are scheduled and completed at the dealership to ensure proper documentation and coverage—this can streamline total repair time and reduce repeated visits.
• Book service online or visit our service specials page to see current offers and save on diagnostics and repairs at Nalley Lexus Smyrna.