Frequently Asked Questions

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

• Check the gas cap: a loose or damaged cap is the simplest and most common cause and can trigger an EVAP code on a 2022 Lexus LC 500.
• Confirm fuel quality and recent fill-ups; contaminated or incorrect fuel can create drivability issues.
• Look for obvious signs: smells, smoke, or performance loss — these indicate a more serious fault that needs immediate attention.
• Run a diagnostic scan at our certified service center to read stored trouble codes and recommend the correct repair.
• Remember: warranty-covered repairs must be completed at a certified dealership to preserve coverage and ensure long-term savings.

How long does a check engine light service take?

• Basic diagnostic scans often take 30–60 minutes to retrieve stored codes for the 2022 Lexus LC 500 and determine next steps.
• If a repair is required, common fixes like replacing a gas cap or oxygen sensor are typically same-day services.
• Complex repairs such as catalytic converter or internal engine work require parts ordering and can extend service to multiple days.
• Our dealership’s factory-trained technicians and direct parts access minimize downtime and reduce repeat visits.
• Scheduling service with Nalley Lexus Roswell delivers immediate and long-term savings versus fragmented repairs, and warranty work must be done at a certified dealer.

How much does a check engine light diagnostic cost for a 2022 Lexus LC 500?

• Standard OBD-II diagnostics typically range from approximately $100–$200; final cost depends on depth of testing and parts required.
• At Nalley Lexus Roswell we frequently cost less than independent shops while offering factory-level service and genuine parts.
• Immediate savings come from accurate diagnosis; long-term savings come from correct repair, warranty protection, and reduced callbacks.
• If the repair is covered under warranty, the work must be performed at a certified dealership to maintain coverage and avoid unexpected expenses.
• We provide transparent estimates before work begins and explain which repairs are recommended versus urgent.

What does it mean when the check engine light comes on in a 2022 Lexus LC 500?

• The light signals a stored trouble code detected by the vehicle’s onboard diagnostics; severity ranges from minor to critical.
• Common causes include a loose gas cap, faulty oxygen sensor, misfire due to ignition or fuel issues, or EVAP leaks.
• More serious codes can indicate catalytic converter degradation, fuel system faults, or engine misfires that harm drivetrain components if ignored.
• Prompt diagnosis at our certified service center prevents escalation, preserves warranty eligibility, and protects resale value.
• We recommend scheduling service quickly so factory-trained technicians can assess and advise on efficient, long-term solutions.

What is the most common reason for check engine light on a 2022 Lexus LC 500?

• A loose or improperly seated gas cap remains the most frequent cause, often resolving after tightening or replacement.
• Following that, oxygen sensor faults and EVAP system leaks are common culprits that trigger stored codes.
• Minor ignition or fuel system misfires can also cause persistent warnings and should be diagnosed promptly to avoid catalytic damage.
• Our dealership’s quick diagnostic workflow identifies the true root cause and prevents unnecessary part replacements.
• Using Nalley Lexus Roswell for diagnosis typically saves money and time, and warranty repairs must be handled by a certified dealership for full coverage.