Frequently Asked Questions

What is the first thing to check when the check engine light comes on in a 2024 Lexus RC 350?

• Check the gas cap for tightness and visible damage — a loose or cracked cap is a common trigger and is easy to correct.
• Scan for stored trouble codes; a simple scan often identifies the system or sensor involved.
• Look for additional dashboard warnings (ABS, oil pressure, temperature) or noticeable performance changes like misfire or stalling.
• Note recent fueling, driving conditions, or fluid levels that could explain the light.
• If the light stays on after basic checks, bring the vehicle to Nalley Lexus Smyrna for a professional diagnostic to preserve warranty and avoid long-term damage.

How long does a check engine light service take?

• Initial diagnostic scan typically takes 30–60 minutes to read codes and perform a basic drive-cycle review.
• Further diagnosis or road-testing may take 1–3 hours depending on symptoms and component access.
• Minor fixes, like replacing a sensor or tightening the gas cap, can often be completed the same day.
• More involved repairs may require parts ordering; Nalley Lexus Smyrna aims to minimize downtime and may provide cost-saving OEM parts included in warranty coverage.
• Choosing our dealership often delivers immediate and long-term savings through accurate diagnosis, factory-trained technicians, and warranty protection that requires certified dealership repair.

What does it mean when the check engine light comes on in a 2024 Lexus RC 350?

• It signals the vehicle’s powertrain or emissions system has detected an irregularity — reasons range from sensor faults to engine misfires.
• Common flagged systems include O2 sensors, EVAP systems, ignition coils, catalytic converter efficiency, and fuel trim.
• The light can indicate minor issues or early signs of more serious faults; only a proper diagnostic can determine severity.
• Ignoring the light can lead to poor fuel economy, increased emissions, and costly repairs such as catalytic converter replacement.
• For accurate diagnosis and to protect warranty coverage, have the vehicle serviced at Nalley Lexus Smyrna where certified technicians ensure correct repair and genuine parts.

How much does a check engine light diagnostic cost for a 2024 Lexus RC 350?

• Diagnostic fees commonly range from approximately $89 to $199 depending on depth of testing required; exact pricing is provided after initial scan.
• Many repairs discovered by the diagnostic can deliver immediate and long-term savings by avoiding progressive damage and maintaining fuel efficiency.
• Nalley Lexus Smyrna often offers competitive pricing that can cost less than independent shops when you factor accurate OEM diagnostics, factory parts, and the value of sustained performance.
• If a repair is covered under warranty, it must be performed at a certified dealership to preserve coverage and ensure OEM parts are used.
• Ask about current service specials and transparent estimates before any repair is performed.

What is the most common reason for check engine light on a 2024 Lexus RC 350?

• The most frequent cause is a loose or faulty gas cap which affects the evaporative emissions system and is simple to remedy.
• Sensors such as oxygen (O2) sensors and mass airflow sensors are also common culprits and can degrade over time.
• Ignition misfires or failing ignition coils and spark plugs may trigger the light and will affect drivability if not addressed.
• Left unaddressed, these issues can lead to reduced fuel economy and more expensive repairs; early service at Nalley Lexus Smyrna limits costs and protects your vehicle’s performance.