Frequently Asked Questions

What is the most common reason for check engine light on a 2013 Lexus IS 250?

• Most common causes include misfires (ignition or fuel), oxygen sensor failure, catalytic converter issues, and a loose or faulty gas cap.
• Oxygen sensors and emission-related faults (P0420, P0135) are frequent on higher-mileage vehicles and affect fuel economy and emissions.
• Ignoring these faults can lead to more expensive repairs—uncorrected misfires often damage the catalytic converter.
• At Nalley Lexus Smyrna our factory-trained technicians use OEM diagnostics to pinpoint root causes quickly, delivering immediate and long-term savings often lower than independent shops.
• Repairs covered under warranty must be performed at a certified dealership to retain coverage.

What does it mean when the check engine light comes on in a 2013 Lexus IS 250?

• The light indicates the engine control module has detected a fault in emissions, ignition, fuel delivery or related systems.
• Severity ranges from minor (e.g., loose gas cap) to serious (e.g., misfire risking catalytic converter damage).
• A steady light typically means a stored fault that needs diagnosis; a flashing light signals urgent action is required.
• Our dealership provides precise OBD-II scanning, freeze-frame data review and OEM-grade testing to determine the correct repair path.
• Choosing Nalley Lexus Smyrna often costs less than independent shops when factoring accurate diagnostics, genuine parts and long-term reliability.

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

• Start with simple checks: ensure the gas cap is tight and examine for obvious fluid leaks or loose wiring under the hood.
• Check oil and coolant levels; low fluids can trigger sensors or lead to faults that illuminate the light.
• Use a diagnostic scan to read stored trouble codes—this is the fastest way to identify the problem reliably.
• Bring your 2013 Lexus IS 250 to Nalley Lexus Smyrna for OEM-grade diagnostics; our factory-trained technicians confirm the issue and recommend repairs that often save money over time.
• Remember: warranty-covered repairs must be completed at a certified dealership to preserve coverage.

How much does a check engine light diagnostic cost for a 2013 Lexus IS 250?

• Typical factory diagnostic scanning fees range from approximately $79 to $149 depending on depth of testing and live-data capture required.
• If additional testing or parts are required, your service advisor will provide a clear estimate before any work begins.
• At Nalley Lexus Smyrna we frequently cost less than independent shops when you include precise OEM diagnosis, genuine parts and long-term savings from correct repairs.
• Diagnostics that resolve the issue now can prevent higher downstream costs—such as catalytic converter replacement—saving you money over time.
• Any repairs covered by warranty must be performed at a certified dealership to remain valid.

How long does a check engine light service take?

• Simple code reads and resets typically take 30 minutes to an hour; a full diagnostic exam usually requires 1–3 hours depending on the issue.
• More complex repairs that need parts or extended testing can take 1–3 days; we provide transparent timelines and status updates.
• Our factory-trained technicians use OEM tools to diagnose correctly the first time, reducing repeat visits and saving you time and money.
• Scheduling online or calling ahead at Nalley Lexus Smyrna helps minimize wait time and get your 2013 Lexus IS 250 back on the road promptly.
• Warranty repairs must be handled at a certified dealership to ensure coverage and documented service history.