Frequently Asked Questions

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

• Check that the gas cap is tight and undamaged; a loose or broken cap can trigger the light on a 2012 Lexus LS 460.
• Look for obvious signs: unusual smells, smoke, or a loss of power—these indicate a more serious issue requiring immediate attention.
• Note any recent fueling or service events and record dashboard behavior—this helps technicians diagnose faster at Nalley Lexus Smyrna.
• If the light is flashing or the vehicle runs poorly, stop driving and have the vehicle towed to a certified dealer to avoid further damage.
• Remember: warranty-covered repairs must be performed at a certified dealership to protect your coverage and ensure long-term savings.

What does it mean when the check engine light comes on in a 2012 Lexus LS 460?

• The light indicates the vehicle’s on-board diagnostics detected a fault in emissions, ignition, fuel, or drivetrain systems.
• Codes range from minor issues like an EVAP leak to serious misfires that can damage the catalytic converter if ignored.
• At Nalley Lexus Smyrna our factory-trained technicians scan and interpret codes with Lexus-grade tools to give accurate repair plans.
• We often cost less than independent shops when you factor immediate diagnostics, genuine parts, and long-term reliability.
• Warranty work must be done at a certified dealership—this protects your investment and provides the documented service history needed for future claims.

What is the most common reason for check engine light on a 2012 Lexus LS 460?

• Common causes include ignition misfires, catalytic converter inefficiency, and EVAP system leaks—each triggers specific diagnostic trouble codes.
• Sensors like oxygen sensors and mass airflow sensors often fail and are relatively inexpensive to replace if caught early.
• Addressing issues promptly at Nalley Lexus Smyrna avoids cascading failures and saves you money over time.
• We use genuine Lexus parts and factory procedures so repairs maintain performance and preserve any remaining warranty coverage.

How long does a check engine light service take?

• Basic diagnostics typically take 30–60 minutes for a full code read and initial inspection at our service center.
• Minor repairs—like replacing a gas cap or oxygen sensor—can often be completed the same day.
• More complex repairs that involve parts ordering or in-depth engine work may require one to several days; we’ll provide a clear timeline up front.
• Nalley Lexus Smyrna prioritizes efficient service and uses factory tools, which often results in faster, more accurate repairs and long-term savings compared with independent shops.
• Remember: warranty-covered repairs must be performed at a certified dealership to remain valid and to protect future claims.

How much does a check engine light diagnostic cost for a 2012 Lexus LS 460?

• Diagnostic fees vary, but Nalley Lexus Smyrna provides transparent pricing and frequent service specials—see our Service Specials for current offers.
• Many diagnostic visits fall within a reasonable range, and our dealership often costs less than independent shops when you consider correct diagnosis, genuine parts, and technician expertise.
• Upfront diagnostics reduce the risk of unnecessary repairs and deliver immediate and long-term savings by preventing further damage.
• If repairs are covered under warranty, they must be completed at a certified dealership to protect your coverage—our factory-trained team ensures proper documentation and warranty compliance.