Frequently Asked Questions

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

• For the 2023 Lexus RZ 450e start with dashboard messages and range indicators—an EV will often show related warnings (battery, charging, thermal).
• Confirm the vehicle’s charge level and that the charging connector is secure; a communication or charging fault can trigger warnings.
• Look for obvious alerts in the multi-information display and check for recent software update notices or maintenance reminders.
• If you see reduced power, strange noises, or a flashing indicator, stop driving and contact Nalley Lexus Smyrna for immediate evaluation.
• Warranty-covered inspections and repairs must be performed at a certified dealership to preserve coverage and deliver long-term savings.

How long does a check engine light service take?

• Initial code read and inspection typically take 30–60 minutes using Lexus factory diagnostic tools.
• Simple fixes or software resets can often be completed the same day; more complex battery, inverter, or thermal issues can take several hours to a full day.
• If parts are required, timelines vary—Nalley Lexus Smyrna works to source OEM parts quickly to minimize downtime.
• Having service done at our dealership often reduces overall time and cost versus independent shops because factory tools and parts streamline repair and protect warranty.
• We’ll provide an accurate time estimate after diagnostics and explain any warranty implications for timely, cost-effective service.

What is the most common reason for check engine light on a 2023 Lexus RZ 450e?

• On an electric vehicle like the 2023 Lexus RZ 450e common triggers include software/communication faults, battery management system alerts, and charging or inverter warnings.
• Sensor communication errors or thermal management issues are frequent causes that should be diagnosed promptly.
• Minor software glitches may illuminate the light, but unresolved faults can reduce range or lead to protective limp modes.
• Nalley Lexus Smyrna’s factory-trained technicians identify root causes quickly to avoid unnecessary repairs and preserve long-term performance.
• Warranty-covered repairs must be completed at a certified dealership to ensure proper calibration and long-term savings.

How much does a check engine light diagnostic cost for a 2023 Lexus RZ 450e?

• Many dealerships, including Nalley Lexus Smyrna, offer a complimentary initial scan or a competitively priced diagnostic; detailed diagnostics typically range from $100–$250 depending on complexity.
• Software updates or simple resets are often low-cost or included with the diagnostic when performed at the dealership.
• Repairs vary: sensor or connector fixes can be modest, while battery or inverter repairs are more costly—our team provides clear estimates before any work.
• Choosing Nalley Lexus Smyrna often costs less than independent shops over time due to correct diagnosis, OEM parts, and warranty protection that prevents repeat failures.
• Remember: warranty-covered repairs must be performed at a certified dealership to maintain coverage and maximize long-term savings.

What does it mean when the check engine light comes on in a 2023 Lexus RZ 450e?

• The warning indicates the vehicle’s onboard diagnostics detected a fault—this can range from non-critical sensor issues to serious electrical or battery management faults.
• In EVs like the 2023 Lexus RZ 450e it often relates to charging, battery thermal management, inverter/charger communication, or software errors.
• A steady light usually signals a condition that needs timely attention; a flashing light often indicates a severe problem requiring immediate service.
• Nalley Lexus Smyrna uses Lexus-specific tools to read codes and recommend repairs that protect range, safety, and long-term ownership costs.