Frequently Asked Questions

What is the first thing to check when the check engine light comes on in a 2023 Lexus RZ 450e?

• Safely pull over and note any warning messages, unusual noises, or loss of power; those details help technicians pinpoint the issue faster.
• Check dash indicators and the 12V battery status; many EVs use the 12V system for critical electronics and warnings.
• If charging or charging-port messages appear, confirm the cable and connector are secure before continuing.
• If the light is flashing or vehicle performance is affected, stop driving and contact Nalley Lexus Roswell to avoid further damage.
• Remember: repairs covered under warranty must be performed at a certified dealership to preserve coverage and deliver long-term savings.

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

• Diagnostic fees typically range from approximately $100 to $200, depending on required testing and scan time.
• At Nalley Lexus Roswell we often cost less than independent shops while providing factory-trained technicians and OEM tools, delivering immediate and long-term savings.
• If a repair is covered by warranty, it must be completed at a certified dealership to maintain coverage and avoid unexpected expenses.
• We provide transparent estimates after diagnosis and can bundle diagnostics with recommended repairs to lower overall costs.
• Ask about service specials and online scheduling to lock in competitive pricing and faster appointment availability.

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

• The light signals the vehicle detected a fault in powertrain, battery management, charging system, or supporting electronics—not necessarily a catastrophic failure.
• Common causes include 12V system issues, battery management or thermal imbalances, inverter/charger faults, sensor communication errors, or software anomalies.
• Some faults are minor and resolvable with a software update or sensor replacement; others require immediate attention to prevent higher repair costs.
• Prompt diagnosis at Nalley Lexus Roswell ensures warranty-covered repairs are performed by certified technicians, protecting long-term value and reliability.
• We recommend scheduling a diagnostic as soon as possible to avoid escalation and to confirm whether it’s safe to continue driving.

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

• One of the most common causes is a 12V battery fault or low-voltage condition that affects vehicle electronics and triggers alerts.
• Battery management system alerts—such as cell imbalance or thermal concerns—also frequently illuminate the check engine light on EVs.
• Software or communication errors between control modules can be common and are often resolved with targeted diagnostics and updates.
• Because warranty-covered diagnostics and repairs must be performed at a certified dealership, bring the vehicle to Nalley Lexus Roswell for accurate service and potential cost savings.
• Timely attention minimizes escalation and preserves long-term performance and resale value.

How long does a check engine light service take?

• Basic diagnostics commonly take one to two hours; a full inspection and system tests can extend to half a day depending on complexity.
• If additional parts or extended testing are required, repairs may take longer; Nalley Lexus Roswell provides clear time estimates after diagnosis.
• Choosing our dealership often results in quicker, more accurate repairs because factory-trained technicians use OEM tools and direct manufacturer resources.
• Warranty repairs must be done at a certified dealership to maintain coverage and maximize long-term savings—our team handles paperwork and parts sourcing to speed turnaround.
• We recommend calling ahead or booking online so we can prioritize your vehicle and minimize wait time.