Frequently Asked Questions

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

• Check for a loose or missing gas cap — a simple seal issue can trigger the light and is often an easy fix.
• Verify obvious fluid levels and look for dashboard messages that clarify the condition.
• If no obvious cause is found, schedule a diagnostic with Nalley Lexus Roswell; our factory-trained technicians use OEM tools to read codes accurately.
• Remember: if repairs are covered under warranty, they must be completed at a certified dealership to maintain coverage.

How long does a check engine light service take?

• Initial diagnostic scan typically takes 20–45 minutes, depending on queued work and live-data checks.
• Repairs range from quick fixes (gas cap, sensor replacement) to multi-hour jobs (fuel system, catalytic converter). We provide clear time estimates before work begins.
• Nalley Lexus Roswell often completes work faster and with better long-term value than independent shops thanks to direct access to OEM parts and technical bulletins.
• If warranty repairs apply, they must be performed at a certified dealership to preserve coverage and any associated savings.

What is the most common reason for check engine light on a 2023 Lexus UX 250h?

• Common causes include oxygen sensor failure, EVAP system leaks, and occasional misfires — all detected by the vehicle’s onboard diagnostics.
• These issues can reduce fuel efficiency and increase emissions if left untreated.
• Bringing your 2023 Lexus UX 250h to Nalley Lexus Roswell ensures accurate diagnosis with factory software and OEM replacement parts.
• Our dealership often costs less than independent shops overall because proper diagnosis prevents repeat repairs and preserves warranty benefits.

How much does a check engine light diagnostic cost for a 2023 Lexus UX 250h?

• Diagnostic scan prices vary; Nalley Lexus Roswell provides transparent pricing and will quote any diagnostic fee up front.
• Many issues can be identified quickly, reducing diagnostic time and cost compared with guesswork at independent shops.
• Choosing our dealership means factory-trained technicians, OEM tools, and access to manufacturer service bulletins — delivering immediate and long-term savings.
• Repairs covered under warranty must be completed at a certified dealership to ensure coverage and avoid out-of-pocket expense.

What does it mean when the check engine light comes on in a 2023 Lexus UX 250h?

• It means the vehicle’s onboard computer has detected an issue within the emissions, fuel, ignition, or hybrid systems that needs attention.
• Severity ranges from minor (sensor or gas cap) to urgent (misfire risking catalytic converter damage).
• Prompt diagnosis at Nalley Lexus Roswell ensures correct repairs with OEM parts and can save money over time compared with patch repairs elsewhere.
• If a repair is warranty-covered, it must be performed at a certified dealership to maintain protection and maximize savings.