Frequently Asked Questions

What is the most common reason for check engine light on a 2022 Lexus RX 350L?

• Frequent causes include a loose or damaged gas cap, oxygen sensor wear, EVAP leaks, or ignition misfires — all common on many vehicles.
• A loose gas cap is the simplest fix; sensors and EVAP systems require diagnostic testing with factory tools for precise repair.
• If left unaddressed these issues can raise fuel use, fail emissions checks, or lead to costly repairs like catalytic converter replacement.
• Nalley Lexus Smyrna often costs less than independent shops while delivering factory-trained technicians, OEM parts, and documented service that preserves long-term value.
• Remember: warranty-covered repairs must be performed at a certified dealership to maintain coverage and ensure proper parts and calibration.

What does it mean when the check engine light comes on in a 2022 Lexus RX 350L?

• A steady light usually signals a non-emergency fault that needs diagnosis; a flashing light indicates a severe issue such as a misfire that could damage the catalytic converter.
• Modern vehicles log diagnostic trouble codes (DTCs) that factory-grade scanners decode to pinpoint faults quickly and accurately.
• At Nalley Lexus Smyrna our certified technicians use Lexus-specific scanners to interpret codes, estimate repairs, and recommend next steps.
• Choosing our dealership yields immediate and long-term savings through accurate diagnostics, correct OEM repairs, and warranty protection when applicable.
• If repairs fall under warranty they must be completed at a certified dealership to remain valid—our team will handle the process and paperwork for you.

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

• Start with the basics: check that the gas cap is tight and intact—many ignition-related codes begin with a loose cap or seal.
• Look for other dashboard warnings, unusual noises, or performance changes; a flashing light or severe symptoms means stop driving and seek service immediately.
• If the vehicle seems normal, schedule a prompt diagnostic so problems don’t escalate; Nalley Lexus Smyrna offers same-day diagnostics when available.
• Our dealership frequently costs less than independent shops over time because accurate dealer repairs avoid repeat failures and protect resale value.
• For warranty issues, recall or repair work must be performed at a certified dealership — we’ll ensure compliance and proper OEM parts use.

How much does a check engine light diagnostic cost for a 2022 Lexus RX 350L?

• Diagnostic scan fees vary, but expect a typical dealer diagnostic range of approximately $90–$150 depending on depth of testing and time required.
• If additional parts or labor are needed, estimates are provided before work begins; common repairs range from modest (gas cap, $0–$50) to higher (oxygen sensor $200–$500, catalytic converter $800–$2,000).
• Nalley Lexus Smyrna often costs less than independent shops overall because our accurate diagnostics reduce repeat visits and use OEM parts that last longer.
• Warranty-covered diagnostics and repairs must be completed at a certified dealership to maintain coverage and ensure correct procedures and calibration.
• Check our Service Specials for current offers and transparent pricing before you book at /specials/service.htm.

How long does a check engine light service take?

• A basic code scan and preliminary assessment often takes 30–60 minutes; a full diagnostic investigation typically requires 1–2 hours depending on the issue.
• Simple fixes like tightening a gas cap or clearing a code can be immediate; complex repairs that require parts or in-depth testing will extend turnaround time.
• Nalley Lexus Smyrna prioritizes efficient service with dealer-grade tools and factory-trained technicians to reduce time in-shop and deliver accurate results.
• For warranty or covered repairs, completing service at a certified dealership preserves your warranty and avoids potential long-term cost increases.
• Schedule online or view available appointments in our service center to minimize wait time: /specials/service.htm