Frequently Asked Questions

What is the first thing to check when the check engine light comes on in a 2025 Lexus RZ 300e?

• Inspect the charging equipment and cable connections if you just charged the vehicle; a loose plug or damaged cord can trigger a warning.
• Check the 12V auxiliary battery condition and terminals—low voltage often causes fault indicators on electric vehicles.
• Look for obvious alerts on the instrument cluster or infotainment system that explain battery thermal or charging issues.
• If basic checks don’t resolve it, schedule service at Nalley Lexus Roswell; warranty-covered repairs must be completed at a certified dealership to preserve coverage.

How much does a check engine light diagnostic cost for a 2025 Lexus RZ 300e?

• Diagnostic fees vary; typical dealer diagnostics start competitively and can be lower than many independent shops because we combine accurate diagnosis with efficient repairs.
• Initial scan often uncovers software updates or sensor resets that cost little compared to larger repairs, saving you money immediately.
• If repairs are covered under warranty, they must be performed at a certified dealership to ensure coverage—this reduces long-term out-of-pocket expense.
• Contact Nalley Lexus Roswell or book service online to get a transparent estimate and learn about current service specials that further lower your cost.

What does it mean when the check engine light comes on in a 2025 Lexus RZ 300e?

• It signals a detected fault in the vehicle’s powertrain, battery management, charging system, or related sensors—EVs use similar warning logic to ICE vehicles.
• Examples include battery thermal events, inverter or motor control faults, charging-port communication errors, or auxiliary system failures like the 12V battery.
• Some faults only require a software update or sensor replacement; others can affect range or drivability and should be inspected promptly.
• Bring the vehicle to Nalley Lexus Roswell for factory-grade diagnostics—warranty repairs must be performed by a certified dealership to ensure coverage and long-term savings.

How long does a check engine light service take?

• Simple scans and software updates are often completed within an hour; more complex issues may require same-day or next-day repair depending on parts availability.
• If further testing or part replacement is needed, our factory-trained technicians provide an estimated completion time upfront, minimizing surprises.
• Using Nalley Lexus Roswell frequently provides faster turnaround because we have OEM tools, direct parts access, and certified processes—this reduces both immediate downtime and future repeat visits.
• Schedule service online or call us to confirm expected times and ask about loaner vehicles or shuttle options when extensive repairs are required.

What is the most common reason for check engine light on a 2025 Lexus RZ 300e?

• Common causes include battery management system notifications, charging communication faults, or ancillary electrical issues like a weak 12V battery.
• Sensors and software calibration are frequent triggers; many are resolved with updates or small component replacements.
• Addressing these issues at a certified dealership ensures correct diagnosis and maintains warranty coverage, often saving you money over time.
• Visit Nalley Lexus Roswell for precise diagnostics and genuine parts to restore performance and protect your investment—book service via our Service Specials page for added savings.