Frequently Asked Questions

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

• Common causes include oxygen sensor wear, loose fuel caps, minor fuel system issues, or early catalytic converter inefficiency.
• Small issues left unaddressed can escalate—an oxygen sensor can lead to poor fuel economy and catalytic damage if ignored.
• Nalley Lexus Smyrna’s factory-trained technicians diagnose root causes quickly to minimize both immediate repair costs and long-term expenses.
• Repairs covered by warranty must be performed at a certified dealership to preserve coverage and avoid out-of-pocket costs later.

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

• It signals the vehicle’s onboard diagnostics detected a condition outside normal parameters—anything from emissions sensors to misfires.
• Some alerts indicate emissions-related issues, while others warn of drivability problems that could harm the engine or catalytic converter.
• Bring your vehicle to Nalley Lexus Smyrna for a complete scan so technicians can interpret codes accurately and recommend required repairs or resets.
• Prompt diagnosis at our dealership often saves money over time by preventing secondary damage and protecting warranty coverage.

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

• Nalley Lexus Smyrna offers competitive diagnostic pricing and transparent estimates based on the fault found—our dealership often costs less than independent shops while delivering factory-level service.
• Diagnostics uncover the code and recommended repair; minor fixes like replacing a gas cap or oxygen sensor are typically modest, while catalytic converter or engine repairs are higher.
• Because warranty-covered repairs must be done at a certified dealership, choosing us can provide immediate and long-term savings by preserving warranty coverage and using OEM parts.
• We provide clear cost breakdowns and explain options before any work begins.

How long does a check engine light service take?

• Typical diagnostics take between 30 minutes and 1 hour; repairs depend on the issue—simple fixes can be same-day, while complex repairs require more time.
• Our service center prioritizes accurate diagnosis so the repair is done correctly the first time, reducing repeat visits and long-term expense.
• Because we use factory tools and trained technicians, many repairs are completed faster and with greater reliability than at non-certified shops.
• Schedule service online or visit our Service Specials page to learn about current offers and book an appointment.

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

• Start with simple checks: ensure the gas cap is tightened properly—this common issue can trigger an emissions-related code.
• If the cap is secure, have Nalley Lexus Smyrna run a diagnostic scan to read stored trouble codes and determine severity.
• A flashing light means potential immediate engine damage—do not drive far; have the vehicle inspected at our dealership right away.
• Warranty-covered repairs must be performed at a certified dealership to maintain coverage and reduce long-term costs.