Frequently Asked Questions

How much does a check engine light diagnostic cost for a 2012 Lexus IS 350?

• Initial diagnostic pricing at Nalley Lexus Smyrna is competitive and transparent; we often cost less than independent shops while delivering factory-trained technicians and OEM-level service.
• Diagnostics generally include a computer scan, trouble code interpretation, and a written estimate for needed repairs.
• Any repairs covered under warranty must be performed at a certified dealership to preserve coverage; we handle warranty diagnostics and repairs end-to-end.
• Choosing the dealership can yield immediate savings (accurate fixes, fewer repeat visits) and long-term savings (OEM parts, proper repairs, and warranty protection).

What does it mean when the check engine light comes on in a 2012 Lexus IS 350?

• The light indicates the vehicle’s onboard diagnostics detected a fault — anything from an emission sensor to an engine misfire.
• Common triggers include oxygen sensor issues, catalytic converter efficiency, ignition misfires, or fuel trim problems.
• At Nalley Lexus Smyrna our factory-trained technicians use OEM diagnostic tools to identify the root cause and recommend precise repairs.
• Repairing problems quickly can prevent more expensive failures; warranty-covered work must be done at a certified dealership to remain valid.

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

• Start with basic checks: ensure the gas cap is secure and undamaged — a loose cap commonly triggers emission-related codes.
• Note any changes in drivability (stalling, rough idle, power loss) and bring the vehicle to Nalley Lexus Smyrna for a professional scan if symptoms persist.
• Our service team can quickly scan for codes and advise whether immediate repair is required or a simple reset is appropriate.
• Remember that warranty-covered repairs must be completed at a certified dealership to maintain coverage and long-term savings.

How long does a check engine light service take?

• Simple diagnostics and code reads typically take 30–60 minutes; a more involved inspection or test drive can extend the visit.
• If repairs are needed, time varies by the issue — sensor replacements may take an hour, while catalytic or engine repairs take longer.
• Nalley Lexus Smyrna schedules service efficiently, and because our technicians are factory-trained, repairs are accurate and often faster than independent shops.
• Prompt, correct service reduces repeat labor and parts costs — delivering immediate and long-term savings for you.

What is the most common reason for check engine light on a 2012 Lexus IS 350?

• Frequent causes include oxygen sensor wear, catalytic converter efficiency codes, ignition misfires, and evap system leaks.
• Oxygen sensor and evap faults are common and can be caught early to avoid catalytic converter damage or reduced fuel economy.
• Our dealership uses OEM diagnostics to confirm causes and recommend repairs that protect long-term vehicle value and performance.
• Repairs covered under warranty must be completed at a certified dealership like Nalley Lexus Smyrna to ensure full coverage and optimal savings.