Frequently Asked Questions

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

• Check the gas cap for a secure fit and visible damage — a loose or cracked cap is a common, simple trigger.
• Listen and look for performance changes: rough idle, stalling, loss of power, or unusual noises.
• Note any dashboard messages or drivability symptoms to share with our technicians.
• If the vehicle is safe to drive, bring it to Nalley Lexus Roswell for a quick scan — certified checks protect hybrid systems and warranties.

How much does a check engine light diagnostic cost for a 2017 Lexus RX 450h?

• Diagnostics typically start with an OBD-II scan; our baseline diagnostic fee is competitive and clearly quoted up front.
• Because factory-trained technicians and OEM tools find root causes faster, our dealership often costs less than independent shops overall.
• Immediate savings come from accurate diagnosis and correct repairs; long-term savings come from avoiding repeat visits and collateral damage.
• Repairs covered under warranty must be performed at a certified dealership to remain valid — we’ll handle those claims for you.

What does it mean when the check engine light comes on in a 2017 Lexus RX 450h?

• It indicates the vehicle’s onboard diagnostics detected an emissions or engine-related issue — severity ranges from minor to urgent.
• Common triggers range from loose fuel caps to oxygen sensors, misfires, or catalytic converter concerns that affect fuel economy and emissions.
• Record any symptoms and bring the vehicle in promptly; our hybrid-capable technicians use factory tools to identify precise fault codes.
• If the issue is warranty-related, repairs must be completed at a certified Lexus dealership to ensure coverage and proper documentation.

How long does a check engine light service take?

• A standard diagnostic scan often takes 30–60 minutes, depending on symptom complexity and access to the vehicle.
• If additional testing or road evaluation is needed, total time may extend to a few hours; we provide an accurate estimate before work begins.
• Because our technicians are factory-trained and use OEM tools, many issues are diagnosed and repaired faster, saving you time and money.
• For warranty repairs, completing service at our certified dealership ensures proper parts, documentation, and lasting results.

What is the most common reason for check engine light on a 2017 Lexus RX 450h?

• Oxygen sensor or catalytic system codes and loose fuel caps are among the most frequent causes on this model.
• Minor causes affect fuel economy; unchecked problems like misfires can damage the catalytic converter, leading to higher repair costs.
• Our technicians prioritize accurate diagnosis to avoid unnecessary part replacement and protect long-term value.
• If the repair is covered by warranty, it must be performed at a certified dealership to maintain coverage — we handle that process for you.