2015 Lexus IS 350 C Check Engine Light

Certified technicians, only the experts.

2015 Lexus IS 350 convertible — Nalley Lexus Smyrna

Experience refined performance from a 3.5L V6 with 306 hp, rear-wheel drive balance, and a responsive automatic transmission. Trust Nalley Lexus Smyrna for certified service and competitive pricing on used luxury vehicles.

Frequently Asked Questions

How much does a check engine light diagnostic cost for a 2015 Lexus IS 350?

Typical diagnostics at our dealership begin with a computerized scan and inspection; many diagnostics are competitively priced and often cost less than independent shops when you factor in accuracy and scope.
We emphasize immediate and long-term savings: correct diagnosis prevents repeat visits, avoids costly downstream repairs, and preserves fuel economy and resale value.
If a repair is covered under warranty, it must be performed at a certified dealership to remain valid — our factory-trained technicians handle warranty work to protect your coverage.
Exact pricing varies by issue; we provide transparent estimates before any repair so you can compare upfront costs and lifetime savings.

What does it mean when the check engine light comes on in a 2015 Lexus IS 350?

The light signals the vehicle’s onboard diagnostics have detected an emission, ignition, or sensor fault—common triggers include oxygen sensors, catalytic converter efficiency, ignition misfires, or EVAP system leaks.
Some faults are minor (loose gas cap or transient sensor glitch); others affect drivability or emissions and require immediate attention.
Our technicians use OEM scan tools to read codes and live data, ensuring accurate identification rather than guesswork often found elsewhere.
Prompt, certified service can prevent progressive damage and higher repair costs down the road, delivering both safety and long-term savings.

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

Start with basic checks you can do safely: ensure the gas cap is secure, check for obvious leaks or unusual noises, and note any drivability symptoms (stalling, rough idle, loss of power).
Even if a simple fix appears to resolve the light, we recommend a professional scan to clear stored codes and confirm no pending faults remain.
Bringing your 2015 Lexus IS 350 to our dealership ensures the scan is performed with factory-grade equipment and that any needed repairs preserve warranty and long-term value.
If the vehicle shows severe symptoms, do not continue driving; have it evaluated immediately to avoid further damage.

How long does a check engine light service take?

Initial computer diagnostics and a basic inspection typically take 30–60 minutes, depending on shop volume and vehicle condition.
If further testing or road evaluation is required, total time may extend to a few hours; we provide clear timelines and keep you informed throughout.
Our factory-trained technicians work efficiently with OEM tools and parts so repairs are done right the first time, saving you follow-up visits and long-term costs.
For warranty-covered repairs, service must be completed at a certified dealership; we handle paperwork and use genuine parts to protect your coverage.

2015 Lexus IS 350 Check Engine Light Flashing

A flashing check engine light on a 2015 Lexus IS 350 usually signals an active engine misfire severe enough to allow unburned fuel into the exhaust, which risks immediate catalytic converter damage and a dangerous driving condition. If you see a flashing light, reduce speed, avoid heavy load or acceleration, and arrange for a tow to our service center rather than driving long distances. Our technicians will perform a prioritized diagnosis using factory scan tools to identify misfires, inspect ignition coils, spark plugs, fuel delivery, and compression. Prompt dealer intervention minimizes the chance of needing an expensive catalytic converter replacement and helps preserve warranty eligibility when applicable.

2015 Lexus IS 350 Check Engine Light Reset

Resetting the check engine light on a 2015 Lexus IS 350 is simple with an OBD-II scanner, but a reset only clears the symptom — it does not fix the underlying fault. Dealers recommend a full diagnostic and repair because a mere reset can mask recurring problems, lead to intermittent failures, and void expectations of warranty coverage. At Nalley Lexus Smyrna, factory-trained technicians use OEM scanners to read freeze-frame data and pending codes, perform repairs with genuine parts, and log service history to protect long-term value. Choosing dealership service often results in lower lifetime cost due to accurate fixes, documented maintenance, and preserved warranty rights.

2015 Lexus IS 350 Check Engine Light Codes

The most common codes for a 2015 Lexus IS 350 point to oxygen sensors (O2), catalytic converter efficiency, ignition misfires (P0300-series), and EVAP system leaks. Ignoring a faulty O2 sensor can drop fuel economy and damage the catalytic converter; replacement typically ranges $150–$400. A failing catalytic converter is one of the costlier outcomes and can cost $1,000–$2,500 depending on parts and labor. Misfires left unchecked accelerate converter wear and can lead to tow-level repairs. EVAP issues are often inexpensive to diagnose and fix ($100–$300), but delaying service risks failed emissions tests. Timely dealer service minimizes cumulative costs and secures warranty eligibility when repairs qualify.

Ready for certified service or to view our used inventory of vehicles like the 2015 Lexus IS 350? Visit Nalley Lexus Smyrna at nalleylexussmyrna.com, check used inventory here, or see current service specials here. Our team provides transparent estimates, factory-trained technicians, and genuine parts to protect your investment.