Frequently Asked Questions

What is the first thing to check when the check engine light comes on in a 2025 Toyota Sequoia?

• Start with simple checks: ensure the gas cap is tight and intact—an unsecured or damaged cap is a common trigger for the light.
• Note any performance changes (stalling, rough idle, loss of power) and avoid prolonged driving if severe symptoms occur.
• Use an OBD-II scanner to read stored trouble codes, or bring the vehicle to Nalley Toyota of Roswell for a professional scan.
• Remember: repairs covered under warranty must be performed at a certified dealership to keep coverage valid.
• Choosing Nalley Toyota often costs less than independent shops while delivering factory-trained service and long-term savings.

How much does a check engine light diagnostic cost for a 2025 Toyota Sequoia?

• A basic OBD-II diagnostic scan is typically in the range of $90–$150, though actual costs vary by the depth of testing required.
• If additional testing or parts are needed, your service advisor will provide a transparent estimate before proceeding.
• Many issues diagnosed early prevent costly repairs later; immediate dealership service delivers both short-term and long-term savings.
• Repairs covered by warranty must be completed at a certified dealership, helping preserve coverage and vehicle value.
• At Nalley Toyota of Roswell we combine OEM parts and factory-trained technicians, often costing less than independent shops for equivalent quality.

What does it mean when the check engine light comes on in a 2025 Toyota Sequoia?

• The light indicates the vehicle’s onboard diagnostics detected a fault—ranging from minor emissions issues to more serious engine or sensor problems.
• Common causes include loose gas cap, faulty oxygen sensors, EVAP leaks, ignition or fuel system faults, and misfires that can damage other components.
• Diagnostic trouble codes point technicians to the affected systems; prompt diagnosis avoids escalation and higher repair bills.
• Warranty-covered work must be performed at a certified dealership to maintain coverage and ensure OEM-quality parts and procedures.
• Nalley Toyota of Roswell provides accurate diagnostics, clear estimates, and immediate and long-term savings compared with many independent shops.

What is the most common reason for check engine light on a 2025 Toyota Sequoia?

• One of the most frequent causes is a loose or faulty gas cap, which can trigger an evaporative emissions code.
• Other common reasons include aging oxygen sensors and EVAP system leaks—issues that degrade fuel economy and emissions performance.
• Early diagnosis at a certified dealership prevents secondary damage (for example, preventing a failed O2 sensor from harming the catalytic converter).
• Repairs under warranty must be completed at a certified dealership to preserve coverage and ensure OEM standards.
• Choosing Nalley Toyota of Roswell often results in immediate repair savings and longer-term value through proper diagnostics and genuine parts.

How long does a check engine light service take?

• A basic code read and initial inspection typically takes 30–60 minutes; more involved diagnostics or repairs can take several hours to a day.
• Simple fixes like tightening a gas cap or replacing an oxygen sensor may be same-day services; complex repairs (e.g., catalytic converter) require longer timelines.
• We schedule appointments to minimize downtime and provide transparent time estimates before work begins.
• Warranty repairs must be completed at a certified dealership to remain valid—this ensures correct procedures and OEM parts are used.
• Nalley Toyota of Roswell prioritizes quick, accurate service that often costs less than independent shops while delivering superior long-term value.