Frequently Asked Questions

What is the most common reason for check engine light on a 2023 Lexus RX 350h?

• Most often the light indicates emissions or ignition issues — common culprits include oxygen sensors, catalytic converter efficiency faults, and occasional misfires.
• Hybrid systems can trigger codes tied to battery charge, inverter, or charging-system sensors; recognizing hybrid-specific alerts early prevents larger failures.
• Ignoring the light can lead to reduced fuel economy, worsening emissions, or damage that raises repair costs dramatically over time.
• Bringing your vehicle to Nalley Lexus Smyrna saves money immediately and long term: our diagnostics and factory-trained technicians often cost less than independent shops while providing superior service.
• Any repairs covered under warranty must be performed at a certified dealership to preserve coverage and ensure OEM parts and procedures.

What does it mean when the check engine light comes on in a 2023 Lexus RX 350h?

• The light is a general warning that the vehicle’s emissions, engine, or hybrid control systems detected a fault; severity ranges from minor sensor alerts to imminent damage.
• A steady light usually signals detectible faults that should be diagnosed soon to avoid efficiency loss or emissions failures.
• Because hybrid systems add complexity, the light can indicate electrical or battery-management issues that require specialized tools and training.
• Nalley Lexus Smyrna uses factory-grade scanners and technicians trained on Lexus hybrid systems — this reduces diagnostic time and the chance of unnecessary repairs.
• Warranty-related fixes must be completed at a certified dealership to retain coverage and ensure genuine parts are installed.

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

• Start with simple checks: make sure the gas cap is secure and not damaged, as a loose cap is a common, low-cost trigger for the light.
• If the cap is secure, our technicians run a swift scan of stored codes to identify system-specific faults rather than guessing at repairs.
• Because the RX 350h is a hybrid, we also check hybrid-system status and related sensors to rule out battery or inverter alerts.
• Using Nalley Lexus Smyrna delivers immediate savings by avoiding unnecessary parts replacement; long-term savings come from correct repairs and OEM parts installed by factory-trained staff.
• Remember: warranty-covered repairs must be performed at a certified dealership to maintain protection and proper documentation.

How long does a check engine light service take?

• Basic diagnostic scans typically take 30–60 minutes to read and interpret fault codes and system data with factory-grade tools.
• If further inspection or road tests are needed to replicate the condition, total time may extend to a few hours; our team keeps you informed and provides accurate time estimates.
• Repairs that follow diagnostics vary by issue — sensor replacements can be same-day, while more involved repairs may require parts ordering or longer shop time.
• Choosing Nalley Lexus Smyrna speeds the process: our technicians have direct access to OEM parts and hybrid-specialized equipment, reducing wait times compared with many independent shops.
• Warranty repairs must be completed at a certified dealership to ensure proper procedures and coverage; we handle warranty paperwork to save you time and future expense.

How much does a check engine light diagnostic cost for a 2023 Lexus RX 350h?

• Diagnostic fees vary, but our dealership offers competitive pricing and transparent estimates after a full scan and inspection.
• Nalley Lexus Smyrna often costs less than independent shops when you factor in accurate diagnosis, correct repairs, and long-term savings from OEM parts and factory procedures.
• If the issue is covered under warranty, the diagnostic and repairs (when applicable) must be handled at a certified dealership in order to preserve coverage.
• We provide clear cost breakdowns before repairs and explain immediate vs. long-term savings — correct repairs now prevent higher future expenses like catalytic converter replacement.
• Ask about current service specials and packaged inspections to maximize value and minimize upfront expense while maintaining Lexus factory standards.