Frequently Asked Questions

What is the first thing to check when the check engine light comes on for a 2026 Toyota Highlander?

• Check that the gas cap is tight and undamaged — a loose cap is a common, simple cause and can clear the light.
• Look for other dashboard warnings or abnormal engine behavior (smoke, strange noises, loss of power).
• If the light is flashing, stop driving and contact us immediately — flashing often signals a serious misfire that can damage the catalytic converter.
• Schedule a diagnostic at Nalley Toyota of Roswell so factory-trained technicians can read codes and recommend OEM repairs.
• Choosing our dealership often costs less than independent shops when you factor accurate diagnosis, warranty protection, and long-term savings.

How much does a check engine light diagnostic cost for a 2026 Toyota Highlander?

• Diagnostic fees typically start around a modest service charge (many dealers begin near $95–$125) to read codes and run initial tests.
• Some issues are identified and resolved quickly; others require additional testing or parts, which our team will explain before work begins.
• Because warranty-covered repairs must be performed at a certified dealership, bringing your Highlander to Nalley Toyota of Roswell protects coverage and future resale value.
• Our factory-trained technicians and OEM parts deliver immediate savings through accurate fixes and long-term savings by preventing repeat visits and follow-on damage.
• Ask about current service offers and transparent estimates for labor and parts before authorizing work.

What does it mean when the check engine light comes on in a 2026 Toyota Highlander?

• The light signals that the vehicle’s onboard computer detected an emissions or engine system fault — codes can range from minor to urgent.
• Common causes include EVAP leaks (loose cap), oxygen sensor problems, ignition misfires, catalytic converter issues, or fuel system imbalances.
• Severity varies: some faults are safe to drive on briefly; a flashing light usually requires immediate attention to avoid major damage.
• Bring your Highlander to Nalley Toyota of Roswell for prompt diagnostics; certified technicians use OEM tools to identify root causes and prevent costly downstream repairs.
• Using our dealership often results in lower total ownership costs compared with repeat independent repairs because we address the true failure and protect warranties.

How long does a check engine light service take for a 2026 Toyota Highlander?

• Simple diagnostics and resetting a light after a quick fix can take as little as 30–60 minutes.
• Repairs vary: minor fixes (gas cap, sensor swap) are often same-day, while more complex repairs (catalytic converter, internal engine work) can take one to several days.
• We provide a clear estimate and timeline up front; OEM parts and factory-trained technicians typically speed accurate repairs and reduce repeat visits.
• If a repair is covered by warranty, the work must be done at a certified dealership to preserve coverage and ensure long-term savings.
• Contact Nalley Toyota of Roswell to schedule convenient service and receive an honest time estimate based on diagnostics.

What is the most common reason for the check engine light on a 2026 Toyota Highlander?

• One of the most frequent causes is an oxygen sensor or EVAP system issue (including a loose or faulty gas cap).
• Other common problems include ignition misfires, clogged catalytic converters, and fuel trim issues that trigger codes like P0171/P0174 or P0300.
• Ignoring these warnings can lead to decreased fuel efficiency, failed emissions inspections, or expensive component damage over time.
• Nalley Toyota of Roswell detects the precise cause with OEM-grade diagnostics and recommends repairs that protect your warranty and lower long-term ownership costs.
• Choosing dealership service often delivers better value than repeated independent fixes because we correct the root cause once with OEM parts and expertise.