Frequently Asked Questions

How long does a check engine light service take?

• Initial diagnostic scan typically takes 30–60 minutes using Lexus factory scan tools to read stored codes and freeze-frame data.
• Minor fixes, like replacing a loose gas cap or clearing a transient code, can be completed the same day.
• Complex repairs — such as replacing oxygen sensors or catalytic components — may require parts ordering and can take 1–3 days.
• At Nalley Lexus Smyrna we often complete work faster and at lower overall cost than independent shops, thanks to access to genuine parts and streamlined warranty procedures.
• Remember: repairs covered under warranty must be performed at a certified dealership to remain valid.

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

• Verify the gas cap is tight and undamaged — a loose cap is a common trigger for the light on a 2019 Lexus RC 300.
• Note any changes in performance, sounds, or dashboard indicators; this helps technicians prioritize diagnostics.
• Bring the vehicle in promptly to avoid escalation — simple fixes at our dealership often save you money long term compared with delayed repairs.
• We recommend having any warranty-related repairs performed at our certified service center to preserve coverage and ensure proper documentation.

What does it mean when the check engine light comes on in a 2019 Lexus RC 300?

• The light indicates the vehicle’s onboard diagnostics detected an emissions, ignition, fuel, or sensor issue that needs attention.
• Codes can range from minor (evaporative system leak) to serious (misfires or catalytic converter faults) and require a professional scan to interpret.
• Early diagnosis at our dealership often reduces total repair cost and protects long-term engine and emissions system health.
• Warranty-covered repair work must be done at a certified dealership like Nalley Lexus Smyrna to maintain coverage and factory part guarantees.

How much does a check engine light diagnostic cost for a 2019 Lexus RC 300?

• Diagnostic fees vary; many dealerships offer a competitive scan fee that includes a full report and technician consultation.
• At Nalley Lexus Smyrna we frequently cost less than independent shops while providing factory tools, OEM parts, and factory-trained technicians — delivering immediate and long-term savings.
• If repairs are needed, we’ll provide a clear estimate before any work begins and discuss warranty options if applicable.
• Remember: any repair covered under warranty must be completed at a certified dealership to preserve that coverage.

What is the most common reason for check engine light on a 2019 Lexus RC 300?

• Common triggers include loose or faulty gas caps, oxygen sensor degradation, and catalytic converter or emissions system faults.
• Ignition misfires from worn spark plugs or coils are also frequent causes and can lead to more expensive damage if delayed.
• Timely service at our dealership helps prevent secondary failures and often reduces total repair cost compared with deferred fixes.
• Warranty-covered components must be repaired at a certified dealer to ensure proper documentation and parts replacement.