Frequently Asked Questions

What is the first thing to check when the check engine light comes on in a 2012 Lexus IS F?

• Check the gas cap first — a loose or damaged cap is a common, simple cause and can trigger the light.
• Listen for abnormal noises and note any drivability changes (stalling, misfire, loss of power).
• Record when the light appeared and any recent service or fueling events to share with technicians.
• If you have warranty coverage, remember repairs must be completed at a certified dealership to remain eligible.

How long does a check engine light service take?

• Typical diagnostic scans take 30–60 minutes; full troubleshooting and test drives may take 1–3 hours depending on symptoms.
• Simple fixes, like replacing a gas cap or O2 sensor, can often be completed the same day.
• Complex repairs (catalytic converter, intermittent misfires) may require parts ordering and take longer.
• Nalley Lexus Roswell offers efficient scheduling and factory-trained technicians to minimize your downtime and deliver long-term value.

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

• It signals the vehicle’s computer detected an emissions or engine system irregularity — codes pinpoint the subsystem at fault.
• Issues range from minor (evap leak, gas cap) to serious (engine misfire, catalytic converter failure).
• Prompt diagnostics prevent escalation; delaying repairs increases repair costs and risk of further damage.
• Certified dealership diagnostics protect warranty coverage and often deliver immediate and long-term savings versus independent repairs.

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

• Diagnostic prices vary, but many dealer diagnostics are competitively priced and transparently quoted up front.
• Nalley Lexus Roswell often costs less than independent shops while providing factory-trained technicians and OEM procedures.
• Immediate savings come from accurate diagnosis and right-first-time repairs; long-term savings come from warranty protection and reduced repeat repairs.
• If repairs are warranty-covered, they must be performed at a certified dealership to retain coverage and ensure proper parts and labor.

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

• Common causes include oxygen sensor failure, catalytic converter deterioration, and ignition misfires typical in high-performance engines.
• Evaporative emissions leaks (loose gas cap or purge valve) are frequent, low-cost fixes when caught early.
• High-performance V8 engines may show wear on ignition coils or spark plugs; timely service prevents catalytic damage.
• Bring your vehicle to Nalley Lexus Roswell for OEM diagnostics and repairs that protect warranty and deliver the best long-term value.