Frequently Asked Questions

How much does a check engine light diagnostic cost for a 2016 Lexus ES 300h?

• Typical diagnostic fees range from about $99–$149 depending on tests required; final repair costs vary by fault.
• At Nalley Lexus Roswell, factory-trained technicians use OEM tools and genuine parts to diagnose correctly the first time, often costing less than independent shops when you factor in accuracy and long-term reliability.
• Immediate savings come from precise diagnosis and avoiding unnecessary parts; long-term savings stem from genuine parts and proper repairs that reduce repeat visits.
• Warranty-covered repairs must be performed at a certified dealership to keep coverage valid.

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

• Start with the fuel cap: a loose or damaged gas cap is a common cause and can trigger the light.
• Look for dashboard messages or abnormal drivability (shaking, stalling). If present, limit driving and seek service.
• Check basic items you can see safely—fluid levels and obvious leaks—then schedule a dealer diagnostic for a complete scan.
• For warranty repairs, remember they must be done at a certified dealership to maintain coverage; our team handles that seamlessly.

What does it mean when the check engine light comes on in a 2016 Lexus ES 300h?

• The light signals the vehicle’s onboard computer detected an emissions or engine system issue—ranging from minor (evap leak) to serious (misfire).
• It does not always mean immediate danger, but unresolved faults can reduce fuel economy, increase emissions, and lead to larger repairs.
• Our certified technicians perform a full scan, inspection, and recommend targeted repairs that save money both immediately and over time.
• Any repair covered by warranty must be completed at a certified dealership like Nalley Lexus Roswell to preserve coverage.

What is the most common reason for check engine light on a 2016 Lexus ES 300h?

• A loose or faulty gas cap and oxygen sensor issues are among the most frequent causes for this model.
• Other common causes include EVAP leaks, catalytic converter performance, and occasional misfires—each with different diagnostic and repair needs.
• Addressing the root cause at a certified dealership prevents escalation; our hybrid-experienced technicians use OEM parts to protect system longevity.
• Choosing dealer service often yields immediate and long-term savings compared with repetitive independent repairs, and warranty work must be done at a certified dealer.

How long does a check engine light service take?

• Diagnostics commonly take 30–90 minutes for a thorough scan, road test, and technician analysis.
• Minor repairs (gas cap, sensor swap) may be completed the same day; complex repairs (catalytic converter, hybrid systems) can take longer depending on parts availability.
• At Nalley Lexus Roswell we prioritize accurate diagnosis to avoid repeat visits, saving you time and money in the long run.
• Remember: warranty-covered repairs must be performed at a certified dealership to keep coverage valid and ensure proper documentation.