Frequently Asked Questions

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

• Confirm the dashboard: note whether the light is steady or flashing — flashing generally signals a more urgent fault.
• Check the gas cap for tightness and visible damage; a loose or damaged cap is a common, simple cause and can clear the code quickly.
• Look for obvious symptoms: poor running, loss of power, or unusual noise — these guide urgency.
• At Nalley Lexus Roswell we recommend a professional scan so the root cause is found; immediate dealership diagnosis often saves money over time.
• Remember: any repair covered under warranty must be completed at a certified dealership to preserve coverage.

How much does a check engine light diagnostic cost for a 2010 Lexus RX 350?

• Diagnostic fees vary by issue, but at Nalley Lexus Roswell we provide transparent pricing and factory-grade scanning to identify codes accurately.
• Dealership diagnosis often costs less than independent shops when you factor in accurate results, correct parts, and avoided repeat repairs.
• Immediate savings come from correct first-time repairs; long-term savings come from preserving vehicle health and warranty coverage.
• If a repair is covered under warranty, it must be performed at a certified dealership to ensure the work and parts remain protected.
• Your technician will explain needed repairs and provide an estimate before work begins so you can choose the best path forward.

How long does a check engine light service take?

• Basic diagnostics often take 30–90 minutes to read codes and perform an initial inspection on a 2010 Lexus RX 350.
• Simple fixes, such as tightening a gas cap or clearing codes after repair, can be completed the same day.
• Complex repairs — oxygen sensor, catalytic converter, or intermittent misfires — require additional time for parts and thorough testing.
• Nalley Lexus Roswell’s factory-trained technicians use OEM tools for efficient, accurate diagnostics to reduce repeat visits and expense.
• Warranty-related repairs must be done at a certified dealership; we’ll advise on timelines and any loaner or shuttle options available.

What does it mean when the check engine light comes on in a 2010 Lexus RX 350?

• The light signals your vehicle’s onboard diagnostics detected a fault — anything from an emissions control issue to an engine misfire.
• Codes range in severity: some affect emissions only, others can harm engine or catalytic converter if ignored.
• A steady light often indicates a non-urgent problem; a flashing light usually means a severe misfire requiring immediate attention.
• Professional diagnosis at Nalley Lexus Roswell pinpoints the code and recommended repair, helping you avoid larger future expenses.
• Warranty-covered issues must be addressed at a certified dealership to ensure coverage and proper repair documentation.

What is the most common reason for check engine light on a 2010 Lexus RX 350?

• Common causes include a loose/damaged gas cap, faulty oxygen sensor, misfires, or EVAP system leaks — each produces specific diagnostic trouble codes.
• Oxygen sensor failures and catalytic efficiency codes are frequent as vehicles age and can affect fuel economy and emissions.
• Addressing these issues at Nalley Lexus Roswell with OEM parts and factory diagnostics often costs less long-term than repeated independent attempts.
• Early diagnosis prevents secondary damage; warranty-covered repairs must be completed at a certified dealership to maintain protection.
• Our technicians will present clear options and explain immediate and future savings from timely, correct repairs.