Frequently Asked Questions

What is the most common reason for check engine light on a 2014 Lexus IS 350?

• Common triggers include misfires, an aging oxygen sensor, catalytic converter efficiency issues, or an EVAP system leak.
• Many issues start small—like a failing O2 sensor—but can lead to reduced fuel economy and emissions failures if ignored.
• Our factory-trained technicians use OEM diagnostics to pinpoint the root cause, avoiding unnecessary parts replacement.
• Prompt dealership service often costs less over time than repeat independent fixes because we fix the true cause the first time.
• Any repairs covered under warranty must be performed at a certified dealership to preserve coverage and assure quality OEM parts.

What does it mean when the check engine light comes on in a 2014 Lexus IS 350?

• Illumination indicates the vehicle’s onboard computer has detected a fault in emissions, engine, or drivetrain systems.
• It can signal anything from a loose gas cap to cylinder misfires or sensor failures that affect performance and emissions.
• Not all codes are urgent, but diagnosis is essential—delaying service can increase repair costs and risk further damage.
• Nalley Lexus Smyrna provides fast, accurate reads with factory-grade scanners so you get reliable answers and a clear repair plan.
• If a repair is warranty-covered, it must be done at a certified dealership to ensure proper documentation and OEM parts installation.

How much does a check engine light diagnostic cost for a 2014 Lexus IS 350?

• Diagnostic fees vary, but our dealership offers transparent pricing and often costs less than independent shops when you factor in correct repairs and warranty coverage.
• An accurate diagnosis at Nalley Lexus Smyrna avoids repeated visits and unnecessary parts, delivering immediate and long-term savings.
• If repairs are covered under warranty, they must be completed at a certified dealership to maintain coverage—our technicians handle that process for you.
• We use OEM tools and factory training to reduce diagnostic time and repair redos, lowering total ownership costs over the life of your 2014 Lexus IS 350.
• Contact our service team for current diagnostic pricing, specials, and an appointment: https://www.nalleylexussmyrna.com/specials/service.htm

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

• Start with the basics: ensure the gas cap is tightened properly—loose caps commonly trigger an EVAP code.
• Listen and feel for drivability issues like misfires, stalling, or reduced power that indicate more serious faults.
• Bring the vehicle to Nalley Lexus Smyrna for a free preliminary scan; factory tools reveal stored and pending codes quickly.
• If the vehicle is under warranty, any covered repairs must be performed at a certified dealership to protect your benefits.
• Our service advisors will explain findings, repair options, and estimated costs so you make an informed choice with clear savings over time.

How long does a check engine light service take?

• Simple diagnostics and minor fixes can take under an hour; thorough diagnostics and parts diagnosis typically require a few hours.
• Repairs vary by issue—sensor replacements are often same-day, while catalytic or internal engine repairs need longer scheduling.
• Nalley Lexus Smyrna prioritizes accurate diagnosis to avoid repeat visits—this approach saves you time and money in the long run.
• We staff factory-trained technicians and keep common OEM parts on hand to expedite service and reduce downtime.
• If warranty work is required, scheduling at a certified dealership ensures proper documentation and preserves warranty benefits.