Frequently Asked Questions

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

• Check for obvious issues first: loose or missing gas cap, low fuel, or a recently disconnected battery.
• If the cap is loose, tighten it and see if the light resets after a drive cycle; this can fix many EVAP codes.
• Note the driving symptoms — rough idle, loss of power, or strange noises — and report them to our service advisors.
• For warranty protection and accurate diagnosis, have any required repairs completed at a certified dealership; we often cost less than independent shops while delivering factory-trained expertise.

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

• Diagnostic fees vary; expect a standard scan and road test to start in an affordable range that we can confirm when you schedule.
• If additional tests or parts are needed, we provide written estimates before work begins so you know immediate and long-term costs.
• Choosing Nalley Toyota Stonecrest can reduce overall expense because our factory-trained technicians diagnose and fix the root cause faster, saving you long-term repair costs.
• Any repairs covered under warranty must be performed at a certified dealership to preserve coverage; our team handles those repairs quickly and correctly.

How long does a check engine light service take?

• Typical code reads and basic diagnostics can take 30–90 minutes depending on symptoms and whether a road test is needed.
• If deeper diagnostics or part inspections are required, we’ll provide an updated time estimate and written approval before continuing.
• Our service center uses OEM tools and factory procedures, so many issues are resolved more quickly and accurately than at independent shops.
• Scheduling with Nalley Toyota Stonecrest helps minimize downtime and delivers immediate and long-term savings through correct repairs and warranty coverage.

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

• The light indicates the onboard diagnostics system detected an abnormality — anything from a loose gas cap to an engine misfire or emissions issue.
• Codes saved in the system point our technicians to the likely subsystem: ignition, fuel, emissions, or sensors.
• Early diagnosis prevents costly secondary damage; for example, driving with a misfire can damage the catalytic converter.
• Have the vehicle inspected at a certified dealership to protect warranties and benefit from factory-trained technicians and cost-effective long-term repairs.

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

• Common causes include loose gas caps, oxygen sensor wear, EVAP leaks, and ignition misfires.
• Some codes are minor and inexpensive to fix; others that go unresolved can escalate into costly repairs.
• Our technicians use OEM diagnostics to confirm the cause quickly and advise on repair priorities to minimize long-term expense.
• Remember: warranty-covered repairs must be completed at a certified dealership to maintain coverage — we handle those repairs efficiently and often at a lower overall cost than independent shops.