Frequently Asked Questions

How much does a check engine light diagnostic cost for a 2018 Lexus LC 500h?

• Typical dealership diagnostics range from a standardized scan fee to a comprehensive diagnostic session; many cases begin with a basic scan that can be under an hour.
• Nalley Lexus Roswell often provides more value than independent shops — immediate savings on accurate diagnostics and long-term savings by preventing misdiagnosed repairs.
• Repairs covered by warranty must be performed at a certified dealership to maintain coverage and ensure genuine parts and factory-trained technicians handle the work.
• If further troubleshooting is needed, we will explain labor estimates and parts costs before any work begins so you know the full cost and expected benefits.

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

• Start simple: check the fuel cap for a secure fit — a loose cap is a common, inexpensive trigger and often resolves the light after a few drive cycles.
• Inspect for obvious issues: low oil, coolant leaks, or visible damage under the hood; don’t ignore unusual noises or smells.
• For accurate diagnosis and warranty protection, bring your 2018 Lexus LC 500h to Nalley Lexus Roswell so factory-level tools and hybrid-aware technicians can verify the cause.
• Taking care of the issue quickly at a certified dealership often reduces repair costs over time and helps preserve resale value and warranty coverage.

What does it mean when the check engine light comes on in a 2018 Lexus LC 500h?

• It signals a detected fault in emissions, engine performance, or hybrid systems; the light can indicate anything from an EVAP leak to a misfire or sensor failure.
• A steady light means a non-immediate issue that still needs prompt attention; a flashing light typically means a severe misfire or condition that can damage the catalytic converter.
• Diagnostic scanning at Nalley Lexus Roswell identifies specific trouble codes and pinpoints whether the issue affects drivability, emissions, or hybrid components.
• Addressing the underlying problem at a certified dealership protects warranty rights and often results in lower life-cycle repair costs due to correct diagnosis and genuine parts.

What is the most common reason for check engine light on a 2018 Lexus LC 500h?

• Common causes include loose fuel caps, oxygen sensor degradation, catalytic efficiency codes, and occasional misfires — any of which can trigger the light.
• Hybrid-specific sensors and emissions systems require factory tools to diagnose correctly; Nalley Lexus Roswell’s technicians have the hybrid training to address these precisely.
• Repairing small issues early at our dealership typically costs less overall than delaying repair — you avoid cascading failures and expensive downstream parts replacement.
• Warranty repairs must be done at a certified dealership to remain valid; we’ll document and complete covered repairs with OEM parts and proper procedures.

How long does a check engine light service take?

• Initial diagnostic scans are often completed in 30–90 minutes, depending on complexity; simple fixes may be completed same-day.
• If parts or deeper troubleshooting are required, we’ll provide a clear timeline and transparent estimate so you know when your vehicle will be ready.
• Nalley Lexus Roswell’s factory-trained team uses advanced tools to speed accurate diagnosis, reducing repeat visits and saving you time and money over independent shops.
• Warranty-covered repairs must be performed at a certified dealership; handling service with us delivers consistent timelines, documented repairs, and long-term savings.