Frequently Asked Questions

How much does a check engine light diagnostic cost for a 2024 Lexus LS 500h?

• Typical diagnostic fees range from $100 to $200 depending on inspection time and tests required.
• At Nalley Lexus Smyrna, diagnostics are conducted with factory-level tools; fees are often waived or reduced when you complete recommended repairs with us, delivering immediate savings.
• Choosing our dealership typically yields lower total cost than many independent shops over time because factory-trained technicians identify root causes quickly and prevent recurring issues.
• Any repairs covered under warranty must be performed at a certified dealership to maintain coverage and ensure genuine parts.

What does it mean when the check engine light comes on in a 2024 Lexus LS 500h?

• The light indicates the vehicle’s on-board diagnostics detected a fault in emissions, ignition, fuel, or sensor systems.
• Common causes include oxygen sensor failure, catalytic efficiency issues, misfires, or evap system leaks.
• Some faults are minor; others can reduce fuel economy, raise emissions, or damage major components if left unaddressed.
• Our factory-trained technicians use Lexus diagnostic software to pinpoint issues and help you understand immediate and long-term savings from timely repairs.

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

• Check the fuel cap – a loose or damaged cap is a common cause and is quick to fix.
• Note vehicle behavior: reduced power, rough idle, or unusual noises can indicate a more urgent issue.
• Schedule a prompt diagnostic at Nalley Lexus Smyrna where we use OEM tools to read codes and recommend economical repairs.
• If a repair is covered by warranty, it must be performed at a certified dealership to preserve coverage and long-term savings.

How long does a check engine light service take?

• Basic diagnostics typically take 30 to 90 minutes depending on code complexity and required testing.
• If repairs are needed, time varies: sensor swaps can be same-day, while catalytic or engine repairs may take longer.
• We prioritize transparent timelines and offer scheduling options; many customers benefit from same-day service when parts are in stock.
• Using our dealership often reduces return visits because diagnostics are thorough and repairs follow factory procedures, saving you time and money over the long term.

What is the most common reason for check engine light on a 2024 Lexus LS 500h?

• The most frequent causes are oxygen sensor failures, catalytic converter efficiency faults, and ignition misfires.
• Evap system leaks (loose fuel caps or lines) are also common and usually inexpensive to fix when addressed early.
• Addressing issues promptly at our dealership prevents escalation to expensive repairs and preserves fuel economy and performance.
• Warranty-covered repairs must be completed at a certified dealership to remain valid, ensuring genuine parts and factory standards.