Frequently Asked Questions

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

• Check the fuel cap—an improperly sealed or loose fuel cap is the simplest, most common cause of an engine light.
• Verify basic fluids and oil level; extremely low oil or coolant can trigger warnings and should be addressed immediately.
• Note any change in performance: stalling, misfires, rough idle, or smoke—these signs require immediate attention.
• Record recent fueling, maintenance, or dashboard messages; that information speeds diagnosis at the dealership.
• If the light is steady, schedule a diagnostic. If flashing, pull over safely and contact Nalley Lexus Smyrna right away for service.

What does it mean when the check engine light comes on in a 2023 Lexus RC 350?

• It signals the vehicle’s onboard diagnostics detected an emissions or engine-related fault; causes range from minor to serious.
• Common possibilities include sensor failures, EVAP leaks, ignition misfires, oxygen sensor issues, or catalytic converter concerns.
• A steady light usually indicates a condition that needs timely diagnosis; a flashing light often signals immediate risk to the engine.
• Bring your 2023 Lexus RC 350 to Nalley Lexus Smyrna for a complete scan—factory-trained technicians identify root causes and protect your warranty.
• Repairs covered under warranty must be performed at a certified dealership to preserve coverage and ensure proper parts and calibration.

What is the most common reason for check engine light on a 2023 Lexus RC 350?

• The most frequent cause is a loose or damaged fuel cap causing an EVAP system fault; it’s inexpensive to correct and easy to check first.
• Other common causes are oxygen sensor degradation, ignition misfires, or EVAP leaks—these impact emissions and fuel economy.
• Ignoring symptoms can lead to higher repair costs later, including catalytic converter damage and reduced engine life.
• Nalley Lexus Smyrna often provides more value than independent shops by combining competitive pricing with factory-trained technicians and genuine parts.
• Remember: any warranty-covered repair must be done at a certified dealership to maintain protection and long-term savings.

How much does a check engine light diagnostic cost for a 2023 Lexus RC 350?

• Diagnostic scan fees vary; a standard OBD-II scan typically ranges from an estimate to a modest fee, depending on inspection depth and tests required.
• Nalley Lexus Smyrna often costs less than independent shops when you factor in accurate diagnosis, OEM parts, and the technician’s training.
• Choosing our dealership provides immediate savings—accurate diagnosis avoids unnecessary repairs—and long-term savings by preventing escalation of damage.
• If the issue is warranty-covered, repairs must be performed at a certified dealership to preserve coverage and avoid unexpected costs.
• Contact Nalley Lexus Smyrna for specific diagnostic pricing and any current service specials that can reduce your out-of-pocket expense.

How long does a check engine light service take?

• A basic scan and initial inspection can take 30 to 60 minutes; a full diagnostic with road testing and component checks may take several hours.
• Simple fixes like tightening a fuel cap or replacing a sensor can often be completed the same day.
• Complex repairs that involve parts ordering, catalytic converter service, or extensive engine work will take longer; we provide clear time estimates up front.
• Nalley Lexus Smyrna’s factory-trained technicians and genuine parts streamline repairs—delivering efficient, reliable service and reduced downtime.
• When warranty work is involved, having repairs performed at our certified dealership ensures proper procedures and long-term savings from covered repairs.