Frequently Asked Questions

What is the first thing to check when the check engine light comes on in a 2025 Lexus LC 500h?

• Check the gas cap: a loose or damaged cap is a common, simple cause and can trigger the light.
• Look for obvious issues: low oil, visible leaks, or disconnected vacuum hoses—these are quick visual checks.
• Note vehicle behavior: rough idle, loss of power, or unusual noises—these details help our technicians diagnose faster.
• Bring it to Nalley Lexus Roswell if unsure: our factory-trained technicians use OEM tools and ensure any warranty-covered repairs are performed at a certified dealership.
• Act quickly: early diagnosis prevents small issues from becoming expensive repairs and delivers immediate and long-term savings versus delayed service.

How long does a check engine light service take?

• Initial diagnostic scan typically takes 30–60 minutes to read codes and capture live data with OEM-grade equipment.
• Simple repairs—such as replacing a gas cap, sensor, or minor hose—can often be completed the same day.
• Complex repairs, like catalytic converter or hybrid system work, may require additional testing and parts and can take one to several days.
• Our service team provides a clear time estimate after the initial scan and prioritizes work to reduce downtime and maximize immediate savings.
• Warranty repairs must be completed at a certified dealership to protect coverage and ensure proper parts and procedures are used.

How much does a check engine light diagnostic cost for a 2025 Lexus LC 500h?

• Diagnostic fees typically range from $100–$200 depending on the depth of testing and whether live-data troubleshooting is required.
• At Nalley Lexus Roswell you benefit from accurate diagnostics by factory-trained technicians, which often costs less than independent shops over time due to precise repairs and fewer repeat visits.
• Final repair costs vary by fault: sensors are lower cost, while catalytic or hybrid component repairs are higher; we provide transparent estimates before any work begins.
• Choosing our dealership delivers immediate savings through correct repairs and long-term savings by preserving fuel economy, emissions systems, and resale value.
• Remember: any repair covered under warranty must be performed at a certified dealership to maintain coverage and ensure OEM parts are used.

What does it mean when the check engine light comes on in a 2025 Lexus LC 500h?

• The light indicates the vehicle’s onboard diagnostics detected a fault in emissions, engine, transmission, or hybrid systems—ranging from minor to serious.
• A steady light often signals a non-critical issue that still requires timely diagnosis to avoid escalation.
• A flashing light usually means active misfires or conditions that can damage the catalytic converter or hybrid components and needs immediate attention.
• Our dealership uses OEM-level scanners and hybrid-specific diagnostics to pinpoint root causes quickly and recommend cost-effective, warranty-protected repairs.
• Prompt dealership service protects performance, fuel economy (26 city / 33 highway), and long-term ownership costs of your 2025 Lexus LC 500h.

What is the most common reason for check engine light on a 2025 Lexus LC 500h?

• Common triggers include oxygen sensor faults, loose gas caps, or minor misfires—each affects emissions and fuel efficiency if left unresolved.
• Hybrid-specific alerts can stem from battery management or inverter-related issues; these require hybrid-trained technicians for accurate repair.
• Ignoring common causes often leads to catalytic converter damage or reduced performance, increasing repair bills significantly.
• Nalley Lexus Roswell’s factory-trained team provides precise diagnosis and repairs that often deliver lower total ownership costs compared with repeated independent shop visits.
• Warranty-covered repairs must be completed at a certified dealership to protect coverage and ensure genuine parts are used for lasting results.