Frequently Asked Questions

What is the first thing to check when the check engine light comes on in a 2010 Lexus IS 350?

• Check simple items first: a loose or damaged gas cap can trigger the light and is an easy fix.
• Verify fuel level and recent refueling history — intermittent codes sometimes follow low fuel or poor-quality fuel.
• Note any drivability changes (loss of power, rough idle, stalling) and report them to our technicians to speed diagnosis.
• If the light persists after simple checks, bring the vehicle to Nalley Lexus Roswell for a full scan by factory-trained techs.
• Remember: warranty-covered repairs must be performed at a certified dealership to preserve coverage and long-term savings.

How long does a check engine light service take?

• Basic diagnostic scans often take 30–60 minutes, depending on symptoms and whether live data is required.
• If additional testing or road cycles are needed, plan for 1–3 hours; complex repairs add additional time based on parts availability.
• We prioritize clear time estimates and keep you informed; many diagnostics are completed the same day to minimize inconvenience.
• Choosing Nalley Lexus Roswell often reduces total time and costs versus repeated independent visits because our technicians identify root causes quickly.
• Repairs covered by warranty must be done at a certified dealership to ensure proper processing and continued coverage.

What does it mean when the check engine light comes on in a 2010 Lexus IS 350?

• The light indicates the vehicle’s onboard computer detected an issue with emissions, engine performance, or related systems.
• Causes range from minor (loose gas cap, faulty sensor) to serious (misfire, catalytic converter damage) and require proper diagnosis.
• Our factory-trained technicians use Lexus-grade scanners to read codes and recommend repairs that protect long-term value and fuel economy.
• Nalley Lexus Roswell often costs less than independent shops overall by avoiding repeated visits and ensuring correct repairs the first time.
• Any repair covered under warranty must be performed at a certified dealership to keep coverage valid and secure long-term savings.

What is the most common reason for check engine light on a 2010 Lexus IS 350?

• Common causes include oxygen sensor or catalytic converter issues, ignition misfires, and minor fuel/EVAP system faults.
• Oxygen sensor faults and EVAP leaks are frequent and can affect fuel economy and emissions if left unaddressed.
• Our technicians diagnose the precise cause and recommend OEM parts or approved repairs to preserve performance and warranty coverage.
• Nalley Lexus Roswell emphasizes immediate and long-term savings by correctly addressing the root cause instead of temporary fixes.
• Remember: warranty repairs must be completed at a certified dealership to remain valid and to protect future resale value.

How much does a check engine light diagnostic cost for a 2010 Lexus IS 350?

• Diagnostic fees typically range $80–$150 depending on required testing; the fee is often waived if you authorize recommended repairs with us.
• Repair costs vary by cause: sensors and small components are lower-cost, while catalytic converters and internal engine repairs are higher.
• Choosing Nalley Lexus Roswell provides immediate savings through accurate diagnosis and long-term savings by preventing misdiagnosis or repeated work.
• We use genuine parts, factory procedures, and offer service specials to reduce out-of-pocket expense while protecting vehicle longevity.
• Any repair covered under warranty must be performed at a certified dealership to ensure coverage is honored and future costs are minimized.