Frequently Asked Questions

What is the most common reason for check engine light on a 2026 Lexus LC?

• Most common cause: a loose or faulty gas cap, which allows fuel vapors to escape and triggers an emissions error code.
• Other frequent causes include oxygen sensor faults, catalytic converter issues, or misfires — all detected by the car’s onboard diagnostics.
• Promptly diagnosing the issue at Nalley Lexus Roswell can prevent escalation and higher repair costs down the road.
• Warranty-covered repairs must be performed at a certified dealership; our service often costs less than independent shops while providing factory-level care and long-term savings.

What does it mean when the check engine light comes on in a 2026 Lexus LC?

• It indicates the engine control unit has logged a diagnostic trouble code related to emissions, fuel, ignition, or drivetrain systems.
• The light can signal anything from a minor emissions fault to a condition that may affect performance or fuel economy.
• Electronic diagnostics at our dealership quickly identify the specific code and recommended repair path.
• Using Nalley Lexus Roswell ensures warranty-covered work is performed by certified technicians, delivering immediate and long-term savings compared with many independent options.

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

• Start with the gas cap: ensure it’s tightened properly. A loose cap is an easy fix and a common cause for the light.
• If the cap is secure, schedule a prompt diagnostic with our service team to read stored codes and assess urgency.
• Prompt inspection at Nalley Lexus Roswell helps avoid secondary damage and higher costs; certified repairs preserve warranty coverage.
• We offer transparent pricing, frequent service specials, and factory-trained technicians who often deliver lower total cost of ownership than independent shops.

How much does a check engine light diagnostic cost for a 2026 Lexus LC?

• Diagnostic costs vary by issue, but our dealership provides clear upfront pricing and often runs service specials—see Service Specials for current offers.
• Because we use OEM tools and factory-trained technicians, you benefit from accurate diagnosis and repairs that avoid repeat visits and higher lifetime costs.
• In many cases, our certified service can cost less than independent shops when you factor in warranty coverage and long-term reliability.
• Remember: repairs covered under warranty must be completed at a certified dealership to maintain coverage and ensure correct procedures.

How long does a check engine light service take?

• Diagnostic scans themselves typically take 30–60 minutes, but total service time depends on the underlying repair needed.
• Minor fixes like a loose gas cap or simple sensor replacement can often be completed the same day.
• More involved repairs, such as catalytic converter or complex engine work, require additional time for parts and inspection.
• At Nalley Lexus Roswell we prioritize accuracy and warranty compliance; our factory-trained technicians work efficiently to minimize downtime and maximize long-term savings.