Frequently Asked Questions

What is the most common reason for check engine light on a 2025 Lexus LX 600?

• Loose or damaged gas cap causing an EVAP system fault; quick to fix and often resolves the light.
• Oxygen sensor or catalytic converter issues that affect emissions and fuel economy if ignored.
• Engine misfires from ignition or fuel delivery problems—these can harm the catalytic converter.
• Faulty sensors or wiring related to turbocharging systems on modern V6 engines.
• Our technicians diagnose quickly with OEM tools to identify the root cause and recommend fixed, cost-effective repairs.

How much does a check engine light diagnostic cost for a 2025 Lexus LX 600?

• Diagnostic fees vary, but our dealership offers transparent pricing and often costs less than independent shops while delivering higher service levels.
• Diagnostics typically cover a full OBD-II scan, live-data review, and technician evaluation using factory software.
• Many issues have modest diagnostic fees but avoiding a prompt diagnosis can lead to much higher repair costs later.
• Warranty-covered repairs must be performed at a certified dealership to preserve coverage; we handle those repairs with OEM parts and factory-trained technicians.
• We’ll explain immediate and long-term savings from timely, dealer-performed service and help plan any necessary repairs.

What does it mean when the check engine light comes on in a 2025 Lexus LX 600?

• Illumination indicates the vehicle’s diagnostics detected a condition affecting emissions, performance, or drivability.
• It can mean minor issues like EVAP leaks or more serious faults like misfires, sensor failures, or turbo system faults.
• A steady light usually signals a non-emergency condition; a flashing light often denotes a severe misfire requiring immediate attention.
• Our factory tools read stored codes and live data to pinpoint cause and prevent escalation to costly repairs.
• Prompt dealership service protects long-term value and may reduce overall ownership costs versus delaying repair.

How long does a check engine light service take?

• Initial diagnostics typically take about 30–90 minutes depending on complexity and the need for road testing or live-data capture.
• Simple fixes, such as replacing a gas cap or oxygen sensor, can be completed the same day in many cases.
• More involved repairs—like catalytic converter replacement or turbo-related work—require additional time for parts and thorough inspection.
• Because Nalley Lexus Smyrna stocks many OEM parts and uses factory-trained technicians, repairs are often completed faster and more reliably than elsewhere.
• We provide accurate time estimates up front and explain how dealership service yields immediate and long-term savings through correct repairs and warranty protection.

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

• Confirm the light’s behavior: steady versus flashing—flashing demands immediate attention and may require stopping the vehicle.
• Check the gas cap for tightness; a loose cap is a common and easily corrected cause.
• Verify visible fluid levels and listen for obvious engine noises, but avoid extensive driving until diagnosed if the light is flashing.
• Schedule a diagnostic scan with our service center so factory tools can retrieve codes and live data to guide repairs.
• For warranty-covered issues, repairs must be completed at a certified dealership—protecting your coverage and long-term ownership costs.