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 faulty gas cap, oxygen sensor failure, evaporative emission (EVAP) leaks, misfires from spark plugs or coils, and catalytic converter issues.
• If left unaddressed, small problems can escalate—an oxygen sensor or misfire can damage the catalytic converter, turning a minor repair into an expensive one.
• Bringing your vehicle to Nalley Lexus Roswell often costs less than independent shops over time because we diagnose correctly the first time, use OEM parts, and prevent repeat repairs.
• Warranty-covered repairs must be performed at a certified dealership to preserve coverage; our factory-trained technicians ensure proper documentation and repair integrity.

How long does a check engine light service take?

• Basic diagnostic scans are typically completed in 30–60 minutes; simple fixes like tightening a gas cap or clearing codes can be resolved the same day.
• Repairs vary: sensor replacement or minor EVAP repairs usually take a few hours; complex jobs such as catalytic converter replacement may require parts ordering and longer service time.
• We prioritize accurate diagnostics to avoid repeat visits—this delivers immediate savings and reduces long-term ownership costs compared with incomplete fixes.
• Warranty work must be completed at a certified dealership; Nalley Lexus Roswell documents and performs repairs to maintain coverage and vehicle value.

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

• A check engine light signals that the vehicle’s engine control unit has detected a fault in emissions, fuel, ignition, or related systems—severity ranges from minor to urgent.
• A steady light usually indicates a non-emergency issue; a flashing light often means active misfires that risk catalytic converter damage and require immediate attention.
• Prompt diagnosis at Nalley Lexus Roswell prevents escalation. Our factory-trained technicians use OEM-level diagnostics to pinpoint root causes for immediate and long-term savings.
• Remember: repairs covered under warranty must be performed at a certified dealership to preserve coverage and ensure proper repair procedures.

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

• Diagnostic scan fees commonly range around $90–$150 depending on the depth of testing and whether additional troubleshooting is required.
• If repairs are needed, costs vary by part and labor—oxygen sensors or coils are moderate, while catalytic converters are significantly more expensive if left to fail.
• Nalley Lexus Roswell frequently delivers better overall value than independent shops because accurate dealer diagnostics and OEM parts reduce repeat repairs and long-term expense.
• For warranty-covered work, any repairs must be completed by a certified dealership; we document repairs and apply warranty labor and parts where applicable.

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

• Start with simple checks: confirm the gas cap is tight and undamaged—this common issue can trigger the light and is an easy fix.
• Look for obvious signs: unusual noises, smoke, strong fuel smell, or performance loss; if present, stop driving and have the vehicle evaluated immediately.
• Schedule a diagnostic scan at Nalley Lexus Roswell—our factory-trained team retrieves freeze-frame data and trouble codes to diagnose correctly the first time.
• Keep in mind warranty-covered repairs must be completed at a certified dealership to preserve coverage; our service saves you time and money over the life of ownership.