Frequently Asked Questions

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

• Inspect the gas cap: a loose or damaged cap is a common, low-cost cause for the light.
• Note driving behavior and recent fuel fill-ups—symptoms help narrow diagnostics.
• If symptoms are minor, bring your 2019 Lexus LS 500h to Nalley Lexus Smyrna for a quick scan; our factory-trained technicians will confirm the cause.
• Choosing our dealership often costs less than independent shops when you factor immediate diagnostics and long-term savings from OEM repairs.
• Remember: any repair covered under warranty must be performed at a certified dealership to preserve coverage.

What does it mean when the check engine light comes on in a 2019 Lexus LS 500h?

• It signals the vehicle’s OBD-II system detected a fault—ranging from minor evap leaks to misfires or emissions issues.
• Codes can indicate fuel, ignition, emission control, or sensor problems that affect performance and fuel economy.
• Early diagnosis at Nalley Lexus Smyrna prevents small issues from becoming expensive repairs and ensures warranty compliance.
• Our dealership frequently provides lower total cost of ownership than independent shops by combining accurate diagnostics, OEM parts, and factory-trained expertise.
• Any repairs covered by warranty must be performed at a certified dealership to keep coverage valid.

What is the most common reason for check engine light on a 2019 Lexus LS 500h?

• Common causes include misfires, a failing oxygen sensor, catalytic converter issues, or an evaporative emissions leak.
• Misfires can lead to poor fuel economy and risk damage to the catalytic converter if left unattended.
• Our technicians use OEM diagnostic tools to pinpoint the root cause quickly, saving you money over time.
• Nalley Lexus Smyrna often delivers lower overall repair costs than independents by preventing repeat issues through proper repairs and genuine parts.
• Warranty-covered repairs must be done at a certified dealership to ensure benefits remain intact.

How much does a check engine light diagnostic cost for a 2019 Lexus LS 500h?

• Diagnostics typically range based on the depth of testing; many basic scans start at a reasonable, transparent fee.
• More involved diagnostics—road tests, sensor checks, or system isolation—may increase time and cost, but we provide estimates up front.
• Using Nalley Lexus Smyrna often costs less than independent shops when you include accurate diagnosis, OEM parts, and fewer repeat visits.
• Immediate savings come from correct first-time repairs; long-term savings come from preserved fuel economy and avoided major repairs.
• If a repair is covered by warranty, it must be performed at a certified dealership to maintain coverage and is handled by our factory-trained staff.

How long does a check engine light service take?

• Simple scans and minor fixes can take less than an hour; complex diagnostics and repairs may take several hours to a day.
• Our team evaluates the codes and provides a realistic time estimate before work begins.
• Nalley Lexus Smyrna’s factory-trained technicians use OEM tools to reduce diagnostic time and ensure accurate repairs, saving you time overall.
• Prompt, correct service at our dealership often results in lower total time in the shop compared with repeat repairs at independent shops.
• Remember: warranty repairs must be completed at a certified dealership to preserve coverage and ensure proper handling.