Frequently Asked Questions

What is the most common reason for check engine light on a 2024 Lexus RX 350?

• Common causes include a loose or damaged gas cap, oxygen sensor failure, evaporative emissions leaks, misfires, or catalytic converter inefficiency.
• Many causes start small (loose cap or sensor) but can escalate into expensive repairs if ignored—timely dealership diagnostics prevent that escalation.
• Addressing issues early at Nalley Lexus Roswell delivers immediate savings (fewer parts, less labor) and long-term savings by avoiding major component failure.
• Repairs covered under warranty must be completed at a certified dealership to remain valid; our factory-trained technicians ensure proper documentation and repair methods.

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

• Start with the basics: ensure the gas cap is tightened until it clicks, then check for other dashboard alerts or loss of power.
• Look for drivability changes—rough idle, stalling, or unusual noises—and note any smells like fuel or burning; these clues help technicians diagnose faster.
• If the light is steady, schedule a diagnostic; if flashing, stop driving and have the vehicle inspected immediately to avoid severe damage.
• Bringing the vehicle to Nalley Lexus Roswell protects warranty coverage and often costs less than independent shops over time due to accurate diagnostics and OEM parts.

What does it mean when the check engine light comes on in a 2024 Lexus RX 350?

• The light indicates the vehicle’s onboard diagnostics (OBD-II) has detected an emissions, performance, or engine fault that requires scanning to identify a code.
• Codes range from minor faults (evap leaks, sensor errors) to serious issues (misfires, catalytic or turbocharger faults) that can affect safety and emissions compliance.
• Our dealership uses factory diagnostic tools to read codes, perform live data analysis, and recommend cost-effective repairs that protect long-term value and fuel economy.
• Any warranty-covered repairs must be performed at a certified dealership to remain eligible; choosing Nalley Lexus Roswell ensures correct repairs and documented service history.

How much does a check engine light diagnostic cost for a 2024 Lexus RX 350?

• Diagnostic fees typically range modestly depending on the scope—many dealerships run a standard scan fee that is often applied to repair costs if you proceed.
• At Nalley Lexus Roswell, our pricing is competitive; we often cost less than independent shops when factoring in accurate diagnostics, OEM parts, and the long-term savings from correct repairs.
• Simple fixes (gas cap, small sensor) are inexpensive, while repairs like catalytic converters or turbocharger work carry higher parts and labor costs—our team will provide transparent estimates.
• Remember: warranty-covered repairs must be completed at a certified dealership to preserve coverage and avoid surprise expenses later.

How long does a check engine light service take?

• Diagnostics typically take 30–90 minutes, depending on code complexity and whether live-data testing is needed to reproduce symptoms.
• Minor repairs, such as tightening a gas cap or replacing an oxygen sensor, can be completed the same day; larger repairs may require parts ordering and could take one to several days.
• Our factory-trained technicians and direct parts access often speed repairs, delivering immediate savings and reducing downtime compared with slower independent sourcing.
• For warranty-covered work, repairs must be done at a certified dealership; choosing Nalley Lexus Roswell ensures timely, documented service that preserves warranty benefits and long-term value.