Frequently Asked Questions

What is the most common reason for check engine light on a 2011 Lexus RX 350?

• Faulty oxygen sensor or catalytic converter issues — these are frequent causes and can affect emissions and fuel economy.
• Loose or damaged gas cap — a simple fix that often resolves the light quickly and inexpensively.
• Ignition system problems like worn spark plugs or coils — can reduce performance and should be addressed by trained technicians.
• Mass airflow sensor or fuel system irregularities — these will degrade efficiency and may lead to higher long‑term repair costs if ignored.
• Bring your 2011 Lexus RX 350 to Nalley Lexus Roswell so factory-trained technicians can diagnose correctly; warranty repairs must be done at a certified dealership to remain valid.

What does it mean when the check engine light comes on in a 2011 Lexus RX 350?

• It indicates the vehicle’s onboard diagnostics detected an issue — from minor emissions faults to system malfunctions.
• It could be as simple as fuel cap pressure loss or as serious as engine misfire; diagnostics determine the exact cause.
• A steady light usually means a non‑urgent fault; a flashing light signals a potentially damaging condition that needs immediate attention.
• At Nalley Lexus Roswell we use OEM-grade scanners and factory-trained technicians to identify root causes quickly, reducing immediate and long‑term costs.
• Remember: any repairs covered under warranty must be completed at a certified dealership to preserve coverage and ensure quality parts and service.

How much does a check engine light diagnostic cost for a 2011 Lexus RX 350?

• Diagnostics at our dealership typically range from a modest fee for scanning to diagnostic time for complex issues; we provide transparent estimates before work begins.
• Because Nalley Lexus Roswell employs factory-trained technicians and OEM tools, many customers find our pricing competitive and often less than independent shops when you factor in accurate diagnosis and lasting repairs.
• Choosing the dealership can yield immediate savings through correct first-time fixes and long‑term savings by avoiding repeat repairs.
• If the issue is warranty-covered, repairs must be performed at a certified dealership — we’ll confirm coverage and handle paperwork to protect your benefits.
• Contact our service desk or visit our Service Specials page to learn current diagnostic rates and available offers.

How long does a check engine light service take?

• Simple diagnostics (scan and basic inspection) can often be completed within 30–60 minutes, depending on shop volume.
• If further testing or road diagnostics are required, total time may extend to a few hours or longer for complex repairs.
• Nalley Lexus Roswell schedules appointments to minimize wait time and provide accurate time estimates before work begins.
• Factory-trained technicians use OEM procedures to speed diagnosis and reduce the chance of repeat visits, saving you time and money over the long term.
• For warranty work, timely service at a certified dealership ensures coverage and typically streamlines repair authorization and parts availability.

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

• Check the gas cap for proper fit and visible damage — a loose or cracked cap is a common, quick fix.
• Note whether the light is steady or flashing; a flashing light usually indicates a severe condition like an engine misfire and requires immediate attention.
• Review recent driving conditions — fuel, performance changes, or unusual noises can guide diagnosis.
• Even for simple signs, bring your 2011 Lexus RX 350 to Nalley Lexus Roswell for an OEM-level scan so a certified technician can confirm the cause and protect warranty coverage.
• Using our dealership often delivers lower total ownership costs due to precise diagnostics, correct repairs, and factory-trained expertise.