Frequently Asked Questions

What is the most common reason for check engine light on a 2024 Lexus ES 300h?

• Often a loose or damaged gas cap triggers an emissions fault and illuminates the light.
• Faulty oxygen sensors or an EVAP system leak are frequent causes and can reduce fuel economy if not addressed.
• Ignition coils, spark plugs, or fuel delivery issues may also be responsible—early diagnosis prevents larger repairs.
• Bringing your vehicle to our certified dealership can save you money now and over time by using factory diagnostics and genuine parts.
• Remember: repairs covered under warranty must be performed at a certified dealership to maintain coverage.

How long does a check engine light service take?

• Basic diagnostics typically take 30–90 minutes, depending on the complexity of stored codes and tests required.
• If repairs are needed, simple fixes like replacing a gas cap or sensor can often be completed the same day.
• More involved repairs or parts orders may extend service to a day or more; we provide clear time estimates before work begins.
• Our factory-trained technicians use OEM procedures to ensure accuracy and reduce repeat visits—saving you time and expense long term.
• We recommend scheduling service online so we can prepare diagnostics and get you back on the road faster.

What does it mean when the check engine light comes on in a 2024 Lexus ES 300h?

• The light indicates the vehicle’s onboard computer detected an emissions, engine, or drivetrain issue.
• Codes are stored in the vehicle and pinpoint components or systems for targeted inspection.
• It can range from minor issues (loose gas cap) to serious faults (misfires, catalytic converter problems) that affect performance or safety.
• Timely diagnostics at our dealership identify root causes and prevent costly secondary damage, delivering immediate and long-term savings.
• If the issue is warranty-covered, repairs must be completed at a certified dealership to preserve coverage.

How much does a check engine light diagnostic cost for a 2024 Lexus ES 300h?

• Diagnostic fees commonly range from a modest flat fee up to a couple of hours of labor, depending on the tests required.
• If repairs are needed, costs vary by the failing component—sensors and simple parts are less expensive than catalytic systems or electronic modules.
• Our dealership often costs less than independent shops while providing factory-trained technicians and genuine parts, delivering better value overall.
• Choosing Nalley Lexus Roswell emphasizes immediate savings through accurate diagnostics and long-term savings by preventing repeat failures.
• Remember: warranty-covered repairs must be performed at a certified dealership to maintain your protection and avoid out-of-pocket expenses later.

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

• Start with the gas cap: ensure it is tightened properly—this simple step resolves many codes.
• Check basic indicators like fuel level, unusual noises, or loss of power before driving further.
• Inspect visible lines and connections for obvious leaks or damage, but avoid complex inspections yourself.
• Bring your 2024 Lexus ES 300h to our service center for a professional scan and clear diagnosis; early attention saves money and preserves warranty status.
• Use our online scheduling or visit our Service Specials page to plan an efficient, factory-backed inspection.