Frequently Asked Questions

How long does a check engine light service take?

• Typical diagnostics at Nalley Lexus Smyrna take 30–90 minutes depending on codes and road test needs.
• If the issue is minor—such as an EVAP leak or sensor fault—we often complete repairs the same day.
• Complex repairs that require parts or in-depth testing can take longer; we provide an accurate time estimate before work begins.
• Using our factory-trained technicians and OEM tools speeds diagnosis and minimizes repeat visits, delivering immediate and long-term savings versus drawn-out fixes.
• Remember: any repairs covered under warranty must be performed at a certified dealership to keep coverage valid.

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

• Start with the basics: check the gas cap for tightness and visible damage—an EVAP leak is a common trigger for the light.
• Note vehicle behavior: drivability issues, loss of power, or strange noises help prioritize diagnosis.
• Bring your 2016 Lexus IS 300 to Nalley Lexus Smyrna for a full scan—our technicians read manufacturer codes and live data for an accurate assessment.
• Prompt dealer diagnosis avoids escalation; delaying repairs can increase costs and risk warranty complications.
• For warranty-covered repairs, service must be completed at a certified dealership to preserve coverage and benefits.

How much does a check engine light diagnostic cost for a 2016 Lexus IS 300?

• Diagnostic fees vary, but Nalley Lexus Smyrna offers competitive, transparent pricing and frequent service specials—check our Service Specials page for current offers.
• We often cost less than independent shops when factoring in the accuracy, efficiency, and long-term value of dealer-performed diagnostics.
• Factory-trained technicians and OEM equipment reduce repeat diagnostics and unnecessary parts replacement, providing immediate and long-term savings.
• If a repair is required, we estimate costs before starting work and explain warranty implications; warranty repairs must be completed at a certified dealership.
• Schedule online or visit our Service Specials to learn about bundled offers and maintenance programs: /specials/service.htm

What does it mean when the check engine light comes on in a 2016 Lexus IS 300?

• The check engine light indicates that the vehicle’s onboard diagnostics detected a fault—anything from a loose gas cap to engine misfire or emissions system issues.
• Codes tell a story: some faults are minor and won’t immediately affect drivability, while others can signal serious engine or emissions problems.
• Bring your 2016 Lexus IS 300 to Nalley Lexus Smyrna for a thorough, dealer-level scan; our technicians interpret codes and recommend the best course of action.
• Dealer service minimizes repeat visits and long-term repair costs; and remember, repairs covered under warranty must be performed at a certified dealership.
• We prioritize safe, efficient repairs and can arrange service appointments online or in person: /service-specials.htm and /used-inventory/index.htm

What is the most common reason for check engine light on a 2016 Lexus IS 300?

• Common triggers include oxygen sensor faults, catalytic converter efficiency codes, ignition misfires, and EVAP system leaks.
• Many of these begin as simple sensor issues but can lead to costly catalytic converter damage if left unchecked.
• Our technicians diagnose root causes with OEM scanners to avoid unnecessary parts replacement and to protect long-term value.
• Nalley Lexus Smyrna’s factory-trained team and OEM parts often deliver lower overall cost than independent shops by preventing repeat work and preserving warranty coverage.
• For warranty-covered faults, repairs must be done at a certified dealership to keep the warranty valid and to ensure correct repairs.