Frequently Asked Questions

What is the most common reason for check engine light on a 2024 Lexus RZ 450e?

• Battery system alerts: many warnings on electric vehicles relate to the high-voltage battery management system, including state-of-charge and cell imbalances.
• Sensors and software: faulty voltage sensors, temperature sensors, or software errors can trigger the light even when drivability seems normal.
• 12V system issues: a low or failing 12V battery often causes control modules to flag errors.
• Immediate dealership inspection helps avoid costly long-term damage; certified technicians use factory tools to pinpoint root causes quickly.

What does it mean when the check engine light comes on in a 2024 Lexus RZ 450e?

• It signals that an onboard control module has detected a fault in the powertrain, battery management, or emissions-related systems.
• Some faults are informational and allow continued driving; others indicate impaired systems and may require prompt attention.
• At Nalley Lexus Roswell we run full diagnostics with Lexus-grade tools to determine severity and recommended repairs.
• Repairs covered under warranty must be performed at a certified dealership to preserve coverage and ensure long-term savings.

How long does a check engine light service take?

• Basic diagnostic scans typically take 30–60 minutes, depending on fault complexity and preliminary tests required.
• Further troubleshooting or component testing can extend service to a few hours; we provide an estimated timeline before work begins.
• Using factory tools and trained technicians accelerates accurate diagnosis, reducing repeat visits and overall cost.
• We prioritize timely service and transparent estimates so you understand immediate and long-term savings from dealer-level repairs.

How much does a check engine light diagnostic cost for a 2024 Lexus RZ 450e?

• Diagnostics at Nalley Lexus Roswell are competitively priced; the fee covers a thorough scan and technician time using Lexus diagnostic systems.
• If repairs are needed, choosing our dealership often means lower overall cost compared with independent shops due to correct-first-time repairs and access to genuine parts.
• Warranty-covered repairs must be completed at a certified dealership to remain eligible, which protects you from future out-of-pocket expenses.
• We provide a clear estimate before any repairs so you see the immediate and long-term savings of dealer service.

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

• Verify dashboard messages and instrument warnings — some systems will give specific alerts alongside the light.
• Check the 12V battery condition and recent charging behavior; many EV faults stem from low 12V power.
• Schedule a diagnostic scan at our dealership; factory diagnostics reveal stored trouble codes and guide safe next steps.
• Remember: repairs that are warranty-covered must be performed at a certified dealership to protect coverage and ensure long-term savings.