Frequently Asked Questions

How much does a check engine light diagnostic cost for a 2017 Lexus IS 300?

• Diagnostics typically start with a complete OBD‑II scan and visual inspection performed by factory‑trained technicians.
• At Nalley Lexus Smyrna we offer competitive diagnostic pricing and service specials; our certified service often costs less than independent shops when you factor in accurate diagnosis, OEM parts, and lasting repairs.
• Immediate savings come from pinpointing the real fault quickly; long‑term savings come from avoiding repeat visits and premature component failure.
• Any repairs covered under warranty must be performed at a certified dealership to preserve coverage and ensure genuine parts and correct procedures.

What does it mean when the check engine light comes on in a 2017 Lexus IS 300?

• The light signals that the vehicle’s onboard computer has detected a fault in emissions, ignition, fuel, or sensor systems.
• Causes range from loose gas caps and oxygen sensors to ignition misfires and catalytic converter issues.
• Severity varies: a steady light may be non‑urgent but still needs diagnosis; a flashing light indicates a serious condition requiring immediate attention.
• Bring your IS 300 to Nalley Lexus Smyrna for accurate codes, expert troubleshooting, and OEM repairs to protect performance and resale value.

What is the most common reason for check engine light on a 2017 Lexus IS 300?

• Common causes include failing oxygen sensors, loose fuel caps, and minor fuel/air mixture issues that trigger diagnostic trouble codes.
• Oxygen sensor faults often show as increased emissions and reduced fuel efficiency if left unaddressed.
• Our technicians use factory diagnostics to differentiate simple fixes from problems that can escalate into costly repairs.
• Choosing Nalley Lexus Smyrna often lowers total ownership cost by catching issues early and performing warranty‑eligible repairs 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 and tighten it if loose, then monitor the light for recurrence.
• If the light persists, schedule a diagnostic scan—do not attempt repeated resets without diagnosis, as that can mask problems.
• Our service team at Nalley Lexus Smyrna will perform a complete scan, interpret codes, and recommend OEM repairs to avoid repeat failures.
• Remember: warranty repairs must be completed at a certified dealership to protect coverage and ensure genuine parts and proper procedures.

How long does a check engine light service take?

• Most diagnostics take 30–90 minutes depending on symptoms and the need for road testing or live data capture.
• Simple repairs such as replacing sensors can often be completed the same day; more involved repairs may require parts ordering.
• Nalley Lexus Smyrna prioritizes efficient service—factory tools and trained technicians speed diagnosis and reduce return visits.
• We provide clear estimates for time and cost, and we emphasize certified repairs to preserve warranties and long‑term value.