Frequently Asked Questions

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

• Common causes include oxygen sensor failure, catalytic converter issues, ignition misfires, mass air flow sensor faults, and EVAP system leaks.
• Some causes are minor (loose gas cap) while others risk engine or emissions damage if left unaddressed.
• Addressing problems early at Nalley Lexus Smyrna often costs less than delaying repairs at independent shops and prevents larger, long-term expenses.
• Warranty-covered repairs must be performed at a certified dealership to remain valid and ensure parts and labor are factory-approved.

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

• It signals that the vehicle’s OBD-II system detected a fault; severity ranges from a loose fuel cap to misfires or emissions control failures.
• A steady light usually means a logged fault code; a flashing light typically indicates active misfire or immediate risk to the catalytic converter.
• Our dealership uses factory-grade scanners to read precise codes and recommend the correct repairs, helping avoid unnecessary parts replacement.
• Repairs done at Nalley Lexus Smyrna can deliver immediate savings, better long-term value, and preserve warranty coverage when applicable.

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

• Start with obvious checks: ensure the fuel cap is tightened and look for dashboard warnings, unusual smells, or loss of power.
• If the light is flashing, stop driving and have the vehicle inspected to prevent catalytic converter damage or engine failure.
• Bring your 2012 Lexus IS 350 C to Nalley Lexus Smyrna for a professional scan—our techs diagnose correctly the first time, saving you time and money.
• Remember: warranty-covered repairs must be completed at a certified dealership to maintain coverage and use genuine parts.

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

• Diagnostic fees vary, but Nalley Lexus Smyrna provides transparent pricing and accurate scans that typically recover value by avoiding needless repairs.
• Because our technicians are factory-trained and use OEM tools, many customers find our overall cost (diagnosis plus correct repair) lower than independent shops when accounting for quality and warranty protection.
• We explain immediate and long-term savings—fixing the root cause prevents repeat visits and costly secondary damage.
• Any repair covered under warranty must be performed at a certified dealership to ensure coverage and proper parts; our team handles both diagnosis and covered repairs efficiently.

How long does a check engine light service take?

• A standard diagnostic scan often takes 30–60 minutes; a simple fix (tighten cap, replace sensor) may be completed the same day.
• Complex repairs, parts ordering, or catalytic work can extend service to a day or more; we give realistic estimates before work begins.
• Nalley Lexus Smyrna’s access to OEM parts and factory-trained staff frequently shortens turnaround time compared to independents, delivering immediate and long-term savings.
• Warranty repairs performed at our dealership follow manufacturer procedures to preserve coverage and ensure reliable results.