Frequently Asked Questions

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

• Typical diagnostic costs range from a modest fee for a scan to a flat-rate inspection; we provide transparent estimates after a factory-level scan.
• At Nalley Lexus Roswell you get factory diagnostic tools and factory-trained technicians, which reduces repeat visits and long-term costs.
• Because we diagnose the root cause quickly, our service often costs less than independent shops when you factor immediate value and long‑term savings.
• If a repair is covered under warranty, it must be completed at a certified dealership to preserve coverage; we handle warranty work in-house.

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

• It indicates the vehicle’s onboard diagnostics detected an emissions, engine, transmission, or hybrid system irregularity that needs evaluation.
• Common causes include sensor faults, fuel‑air mixture issues, ignition misfires, EVAP leaks, or emissions control problems.
• Some conditions are minor but others can lead to reduced performance, higher fuel use, or damage if ignored—prompt diagnostics are recommended.
• Bring your LS 500h to Nalley Lexus Roswell for a complete factory-level scan and an accurate repair plan using genuine Lexus parts.

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

• Start with the basics: ensure the gas cap is tight and properly seated—an EVAP leak from a loose cap is a common cause.
• Look for immediate symptoms: loss of power, stalling, abnormal noises, or a flashing light—these affect how you should proceed.
• If the light is flashing, stop driving and have the vehicle inspected immediately to avoid further damage.
• For accurate diagnosis and warranty protection, schedule a factory diagnostic at Nalley Lexus Roswell rather than clearing codes yourself.

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

• Frequent triggers include oxygen sensor failures, EVAP system leaks (loose gas cap or purge valve), and ignition misfires that affect emissions.
• Oxygen sensors and catalytic converter issues are common on luxury hybrids if sensors age or emissions thresholds are not met.
• Addressing these soon prevents expensive secondary repairs—early service protects the converter, fuel economy, and emissions components.
• Our dealership uses OEM diagnostics to find the precise cause, and because warranty repairs must be done at a certified dealer, we keep coverage intact.

How long does a check engine light service take?

• Initial factory-grade diagnostics typically take 30–90 minutes depending on symptoms and live-data capture needs.
• Repair times vary: simple fixes may be same-day, while component replacements or warranty-authorized work can take longer.
• Because we stock genuine Lexus parts and employ factory-trained technicians, repairs are efficient—minimizing downtime and long-term costs.
• For warranty-covered issues, having the service performed here ensures proper procedures and coverage, avoiding repeat visits and added expense.