Frequently Asked Questions

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

• Common causes include oxygen sensor failures, misfires (spark plugs or ignition coils), catalytic converter efficiency issues, and EVAP system leaks.
• If left unaddressed, these issues can reduce fuel economy, increase emissions, and lead to more costly repairs like catalytic converter replacement.
• Nalley Lexus Smyrna’s factory-trained technicians identify root causes quickly, often saving you money compared with independent shops by avoiding repeat visits and improper parts.
• Remember: warranty-covered repairs must be completed at a certified dealership to preserve coverage and long-term savings.

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

• The light signals the vehicle’s onboard diagnostic system has detected a condition affecting emissions, performance, or drivability.
• It can range from minor issues (loose gas cap or sensor drift) to serious faults (engine misfire, catalytic damage).
• Nalley Lexus Smyrna uses OEM-grade scanners and manufacturer procedures to determine severity, so repairs are accurate and lasting.
• Handling diagnostics and repairs at our dealership often yields immediate and long-term savings through correct fixes, genuine parts, and warranty protection.

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

• Start with simple checks: ensure the gas cap is secure, check fuel level, and note any drivability symptoms (misfires, loss of power, noise).
• If the light is steady, schedule a diagnostic scan; if flashing, stop driving and contact our service team immediately.
• Nalley Lexus Smyrna’s technicians will perform a full scan and inspection to avoid unnecessary part replacements and to maximize long-term savings.
• For any warranty-related failures, repairs must be performed at a certified dealership to keep warranty protection intact.

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

• Diagnostic fees vary by inspection depth, but typical dealer diagnostics range from about $100–$200 for an electronic scan and visual inspection; exact pricing depends on findings.
• Nalley Lexus Smyrna often costs less than independent shops for complete, correct diagnostics because we accurately isolate issues and prevent repeat repairs.
• Choosing the dealership often results in immediate savings (correct first-time repair) and long-term savings (proper parts, warranty coverage, and factory procedures).
• If a repair is covered by warranty, it must be completed at a certified dealership like Nalley Lexus Smyrna to ensure coverage and avoid future costs.

How long does a check engine light service take?

• Basic diagnostic scans and a visual inspection often take about 30–90 minutes, depending on symptoms and technician workload.
• If additional testing or road checks are needed, or parts must be ordered, repair time can extend to several hours or a day.
• Nalley Lexus Smyrna prioritizes accurate diagnostics by factory-trained technicians to minimize repeat visits and deliver real savings over time.
• For warranty-covered repairs, having the work done at our certified dealership ensures proper documentation and preserves your long-term protection.