Frequently Asked Questions

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

• Start simple: confirm the gas cap is tightened and undamaged — a loose cap is a common trigger.
• Look for other dashboard warnings or drivability changes (noise, smoke, loss of power).
• If the light is flashing, stop driving and have the vehicle inspected immediately by our dealership to avoid further damage.
• Record any recent fueling, repairs, or fuel type used (use premium unleaded as required) to share with the technician.
• Bring the 2019 Lexus LC 500h to Nalley Lexus Smyrna — our certified service saves you money now and over time, and warranty-covered work must be done at a certified dealership.

How long does a check engine light service take?

• Initial diagnostic scan usually takes 30–60 minutes; a more thorough evaluation may take up to 90 minutes depending on complexity.
• Simple fixes like a loose gas cap or sensor replacement can often be completed the same day.
• Complex repairs (misfire diagnosis, catalytic converter, hybrid system) require additional time for parts and testing.
• Our factory-trained technicians and direct parts access help reduce wait time and deliver long-term savings compared with prolonged, uncertain repairs elsewhere.
• Warranty-covered repairs must be performed at a certified dealership like Nalley Lexus Smyrna to preserve coverage and maximize value.

What does it mean when the check engine light comes on in a 2019 Lexus LC 500h?

• It signals the onboard diagnostics system detected a fault — from minor emissions issues to serious engine misfires or hybrid-system faults.
• Common triggers include EVAP leaks, oxygen sensors, catalytic converter efficiency, misfires, and fuel system irregularities.
• A steady light usually indicates a non-emergency fault; a flashing light signals an active misfire or condition that can damage the catalytic converter.
• Prompt dealer diagnostics protect performance, fuel economy (27 city / 35 hwy), and long-term costs; our service often costs less than independent shops while providing factory expertise.
• Remember: warranty-covered repairs must be completed at a certified dealership to remain valid.

What is the most common reason for check engine light on a 2019 Lexus LC 500h?

• The most frequent cause is a loose or faulty gas cap triggering an EVAP system fault; it’s quick to inspect and fix.
• Other common causes include oxygen sensor degradation and minor fuel or ignition irregularities.
• Ignoring symptoms can increase fuel consumption and lead to expensive repairs like catalytic converter replacement.
• Bringing your LC 500h to Nalley Lexus Smyrna ensures accurate diagnosis, genuine parts, and factory-trained technicians—often saving you money immediately and over time.
• Warranty work must be performed at a certified dealership to preserve coverage and maximize savings.

How much does a check engine light diagnostic cost for a 2019 Lexus LC 500h?

• Diagnostic fees vary; a dealer diagnostic typically ranges from a modest flat fee to a rate that is often competitive and can be less than independent shops when factoring in accuracy and parts sourcing.
• Simple code reads may be low-cost, while in-depth diagnostics for intermittent faults or hybrid systems take longer and may cost more.
• Choosing Nalley Lexus Smyrna brings immediate savings through efficient diagnostics and long-term savings via genuine parts and correct repairs the first time.
• If repairs are covered under warranty, they must be performed at a certified dealership to remain valid, protecting you from unexpected expenses later.
• Check our Service Specials for current offers and book service online to save time: Service Specials.