Frequently Asked Questions

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

• Check the gas cap for a secure fit — a loose or damaged cap is a common trigger for the 2016 Lexus RC 300.
• Scan for codes if possible; many phone-grade tools only give limited information — a dealer scan provides complete OEM data.
• If the light is flashing or the vehicle shows severe symptoms (loss of power, smoke), stop driving and have the vehicle inspected immediately.
• If your vehicle is under warranty, remember repairs covered by warranty must be performed at a certified dealership to maintain coverage.
• Bringing the car to Nalley Lexus Smyrna ensures factory-trained technicians diagnose the true cause and help save money over time by preventing larger failures.

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

• Diagnostic fees commonly range between $100 and $200 depending on the depth of testing and road evaluation required.
• At Nalley Lexus Smyrna we often deliver lower overall costs than many independent shops by identifying the precise fault quickly and avoiding unnecessary parts replacement.
• Diagnostics are frequently credited toward repair work — ask about promotions and service specials for savings.
• Long-term savings are realized through accurate diagnosis, OEM parts, and repairs performed by factory-trained technicians who prevent repeat failures.
• Remember that any repairs covered under warranty must be completed at a certified dealership to keep coverage intact.

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

• The check engine light signals that the vehicle’s on-board diagnostics detect a fault ranging from minor (loose gas cap) to serious (engine misfire or emissions control issues).
• Codes can indicate sensor failures, ignition problems, fuel system issues, or emissions control concerns that affect performance and economy.
• Early diagnosis at a certified dealership reduces repair time and cost and helps preserve warranty coverage when applicable.
• Nalley Lexus Smyrna’s factory-trained technicians use OEM tools to read all codes and provide a clear repair path that avoids unnecessary parts replacement.
• Prompt service protects long-term value by preventing collateral damage such as catalytic converter failure or engine wear.

How long does a check engine light service take?

• Initial code reading and basic inspection typically take 30–60 minutes; a full diagnostic with road test and live data review often takes 1–3 hours.
• Simple repairs, like tightening a gas cap or replacing a sensor, can often be completed the same day.
• More complex repairs (ignition, fuel system, catalytic converter) can require additional parts and may take one to several days depending on parts availability.
• Nalley Lexus Smyrna prioritizes efficiency with OEM parts and factory-trained technicians, often delivering faster, more reliable results and better long-term value than many independents.
• If repairs are covered by warranty they must be performed at a certified dealership to keep coverage valid—this also helps avoid repeat visits and extra costs.

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

• Loose or faulty gas caps are among the most frequent and easiest-to-fix causes of the check engine light.
• Other common issues include oxygen sensor faults, ignition misfires (spark plugs/coils), and mass airflow sensor problems.
• Catalytic converter efficiency codes can appear when upstream sensors or misfires are left unaddressed, leading to costly repairs.
• Timely diagnosis at Nalley Lexus Smyrna avoids escalation; our technicians identify root causes and recommend OEM repairs to preserve reliability and resale value.
• For warranty-related repairs, be aware they must be completed at a certified dealership to maintain coverage and maximize long-term savings.