Frequently Asked Questions

How much does a check engine light diagnostic cost for a 2025 Lexus IS 300?

• Typical diagnostic fees range from about $100 to $200 depending on the depth of testing and parts inspections.
• Nalley Lexus Smyrna often costs less than independent shops while delivering factory-trained technicians and OEM tools—providing immediate savings on accurate diagnosis and long-term savings by avoiding misdiagnoses.
• If the problem falls under warranty, repairs must be completed at a certified dealership to preserve coverage and ensure OEM parts and procedures are used.
• Ask about current service specials at https://www.nalleylexussmyrna.com/specials/service.htm for reduced diagnostic or bundled offers.

What does it mean when the check engine light comes on in a 2025 Lexus IS 300?

• The light indicates the vehicle’s computer has detected a condition outside normal limits — anything from emissions system irregularities to misfires or sensor faults.
• Common causes include fuel trim issues, faulty oxygen or temperature sensors, ignition misfires, or EVAP system leaks.
• At Nalley Lexus Smyrna we use factory-grade diagnostics to read codes and perform targeted inspections, reducing unnecessary parts replacement and saving you money over time.
• If covered by warranty, repairs must be performed at a certified dealership to maintain coverage and proper documentation.

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

• Begin with simple checks: ensure the gas cap is tight and undamaged — a loose cap is a common cause of emissions-related codes.
• Next, check for obvious signs like poor running, stalling, or unusual noises; note these for the technician.
• Bring your 2025 Lexus IS 300 to Nalley Lexus Smyrna for a comprehensive scan with factory tools to identify the precise fault and prevent escalation.
• Certified dealership service protects warranty status and provides accurate repair history for resale value.

What is the most common reason for check engine light on a 2025 Lexus IS 300?

• Common triggers include oxygen sensor faults, EVAP system leaks (fuel cap or canister), ignition misfires, and catalytic converter efficiency warnings.
• Many of these begin as minor issues that, if ignored, can lead to higher fuel use or expensive components like catalytic converters failing.
• Nalley Lexus Smyrna’s factory-trained technicians quickly pinpoint root causes to minimize long-term repair costs and preserve performance.
• Remember: warranty-covered repairs must be performed at a certified dealership to remain valid.

How long does a check engine light service take?

• Basic diagnostic scans are often completed within 30–60 minutes; more complex inspections or road tests can extend to several hours.
• If parts replacement is required, total time depends on part availability and repair complexity; we aim to minimize downtime with efficient scheduling.
• Nalley Lexus Smyrna’s technicians use factory procedures and OEM parts to ensure repairs are done right the first time, which saves you time and cost over repeated fixes.
• Ask about our service specials and convenient appointment options at https://www.nalleylexussmyrna.com/specials/service.htm to plan your visit.