Frequently Asked Questions

How much does a check engine light diagnostic cost for a 2026 Lexus IS?

• Diagnostics typically range from a modest inspection fee to a comprehensive scan and road test; exact pricing depends on the issue found.
• Common diagnostic fees at Nalley Lexus Smyrna are competitive and often cost less than independent shops, while delivering factory-level accuracy and OEM parts recommendations.
• Choosing dealership service provides immediate savings through correct first-time repairs and long-term savings by preventing repeated failures and protecting fuel efficiency.
• If a repair is covered under warranty, the work must be performed at a certified dealership to keep coverage valid; we handle warranty diagnostics and repairs end-to-end.

What does it mean when the check engine light comes on in a 2026 Lexus IS?

• The light is a general indicator that the engine management or emissions system has detected a fault—anything from a loose cap to a sensor or misfire.
• It can signal reduced fuel economy, higher emissions, or a problem that could escalate into more expensive repairs if ignored.
• Nalley Lexus Smyrna uses OEM-grade scanners and factory-trained technicians to read codes, interpret freeze-frame data, and recommend precise repairs.
• Prompt dealer diagnostics protect long-term value and preserve warranty eligibility when repairs are needed; covered repairs must be completed at a certified dealership.

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

• Start with simple checks: ensure the gas cap is secure—an EVAP leak from a loose cap is a frequent, low-cost cause.
• Note any changes in drivability, unusual noises, or dashboard warnings; that information helps expedite accurate diagnostics at the dealership.
• If the light is flashing or the vehicle is running poorly, stop driving and have the 2026 Lexus IS inspected immediately to prevent further damage.
• Bringing the vehicle to Nalley Lexus Smyrna quickly preserves diagnostic data and helps qualify warranty work when applicable; warranty repairs must be done at a certified dealership.

What is the most common reason for check engine light on a 2026 Lexus IS?

• Common causes include ignition misfires, oxygen sensor or catalytic converter issues, and EVAP system leaks.
• Misfire codes and sensor failures are frequent on modern engines and, if left unchecked, can damage the catalytic converter and increase repair cost.
• Nalley Lexus Smyrna’s factory-trained technicians identify root causes using OEM diagnostics to avoid unnecessary parts replacement.
• Repairing problems promptly at the dealership often yields immediate and long-term savings versus recurring fixes elsewhere; warranty-covered repairs must be performed by a certified dealer.

How long does a check engine light service take?

• A basic code read and explanation may take 20–45 minutes; a full diagnostic with road testing and component testing can take 1–3 hours depending on complexity.
• If parts are required, repair time varies—simple sensor replacements are often same-day, while exhaust or engine repairs may take longer.
• Choosing Nalley Lexus Smyrna gives the advantage of access to OEM parts, factory procedures, and efficient turnaround, often reducing total downtime.
• When repairs are warranty-covered, completing service at a certified dealership ensures the work is documented correctly and the warranty remains valid, protecting long-term savings.