Frequently Asked Questions

How much does a check engine light diagnostic cost for a 2020 Lexus LC 500?

• Diagnostic fees vary, but our dealership provides transparent pricing and efficient diagnostics to find the root cause quickly.
• We often cost less than independent shops because accurate diagnosis reduces unnecessary parts and repeat labor, delivering immediate savings.
• Long‑term savings come from repairs done right the first time by factory‑trained technicians using OEM parts.
• Any repair covered under warranty must be performed at a certified dealership to maintain coverage and ensure proper parts and procedures.

What does it mean when the check engine light comes on in a 2020 Lexus LC 500?

• It signals that the engine control unit detected a fault in emissions, ignition, fuel, or related systems and stored a diagnostic trouble code (DTC).
• Severity ranges from minor (e.g., loose gas cap) to serious (e.g., misfire that can damage the catalytic converter).
• Our technicians read the stored codes, run live diagnostics, and recommend repairs or further testing based on OEM procedures.
• Prompt dealership diagnosis preserves warranty options and reduces the risk of costly secondary damage.

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

• Start with simple checks: confirm the gas cap is tight and inspect visible fluid levels and belts.
• If the light persists, avoid prolonged driving and schedule diagnostics—continuing to drive can worsen some faults.
• Bring the vehicle to Nalley Lexus Smyrna so our technicians can run OEM diagnostics and protect any warranty coverage.
• Our service advisers explain findings, estimate repairs, and highlight immediate and long‑term savings from dealer‑performed work.

How long does a check engine light service take?

• Code retrieval and initial diagnostics typically take about 30–90 minutes; more complex issues may require extended testing or parts ordering.
• Repairs can range from a quick fix (gas cap, sensor) to several hours for components like catalytic converters—our service team provides clear time estimates up front.
• We prioritize accuracy to avoid repeat visits; dealer service often saves time overall compared with repeated independent attempts.
• Schedule online at our service specials page to reserve a convenient appointment and check current offers: /specials/service.htm.

What is the most common reason for check engine light on a 2020 Lexus LC 500?

• Common causes include oxygen sensor faults, EVAP system leaks (loose gas cap), ignition misfires, and failing catalytic components.
• Many issues begin small but can escalate—an unresolved sensor problem can reduce fuel economy and damage emissions components.
• Our dealership pinpoints the exact cause with OEM scanners and recommends repairs that protect performance and resale value.
• Warranty repairs must be done at a certified dealership to ensure coverage and use of genuine parts.