Frequently Asked Questions

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

• Check the gas cap: a loose or damaged cap is a common trigger and is quick to fix.
• Review recent driving conditions: short trips, low fuel, or using the wrong fuel grade can prompt the light.
• Look for obvious issues: unusual smells, smoke, or fluid leaks require immediate attention.
• If basic checks don’t resolve it, bring your 2017 Lexus IS 350 to Nalley Lexus Smyrna for a diagnostic; warranty-covered repairs must be performed at a certified dealership.

How much does a check engine light diagnostic cost for a 2017 Lexus IS 350?

• Diagnostic fees vary, but Nalley Lexus Smyrna provides transparent pricing and often costs less than independent shops while delivering factory-trained technicians and OEM parts.
• Immediate savings come from accurate diagnosis and avoiding unnecessary repairs; long-term savings come from correct repairs that preserve vehicle value and reliability.
• Repairs covered under warranty must be completed at a certified dealership to retain coverage and ensure proper parts and procedures.
• We’ll present options after diagnosis so you can weigh cost, warranty coverage, and recommended repairs.

What does it mean when the check engine light comes on in a 2017 Lexus IS 350?

• The check engine light signals that the vehicle’s onboard diagnostics detected an emission, engine, or transmission-related issue.
• It ranges from minor sensor faults to serious problems like misfires or catalytic converter issues—only a scan tool can identify the specific code.
• Ignoring the light can increase fuel consumption, reduce performance, or cause further damage that raises repair costs.
• Bring your Lexus to Nalley Lexus Smyrna for a prompt, accurate scan and a clear repair plan from factory-trained technicians.

How long does a check engine light service take?

• Initial diagnostics typically take 30–60 minutes to retrieve and interpret codes and perform basic tests.
• If the issue is simple—such as a loose gas cap or a single sensor—the repair can often be completed the same day.
• Complex repairs that require parts or deeper troubleshooting may take longer; we provide time estimates up front so you can plan.
• At Nalley Lexus Smyrna, factory-trained technicians and a well-stocked parts department speed repairs and protect warranty coverage.

What is the most common reason for check engine light on a 2017 Lexus IS 350?

• Common causes include oxygen sensor failures, catalytic converter degradation, and ignition misfires; these affect emissions and performance.
• Sensors and emission components are sensitive to fuel quality—remember this Lexus requires premium unleaded fuel for optimal operation.
• Timely diagnosis prevents escalation: what starts as a sensor replacement can become an expensive catalytic converter repair if ignored.
• Our dealership diagnosis identifies the root cause and recommends repairs with OEM parts, preserving long-term reliability and warranty eligibility.