Frequently Asked Questions

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

• Check for obvious issues first: a loose or missing gas cap can trigger the light.
• Verify fuel level and listen for unusual noises; some problems are simple and safe to spot.
• If the vehicle shows reduced power or strange vibrations, stop driving and have it inspected.
• For accurate diagnosis and to protect warranties, bring your 2025 Toyota Highlander to Toyota of Greenville for testing.
• Certified dealership service often costs less than independent shops over time because we prevent misdiagnosis and use genuine parts backed by warranty.

How long does a check engine light service take?

• Typical diagnostic scans take 30–60 minutes, depending on system complexity and live-data checks.
• Repairs may extend the visit; many common fixes are completed the same day when parts are available.
• Time estimates are provided up front so you can plan—our service advisors communicate each step clearly.
• Warranty-covered repairs must be done at a certified dealership to retain coverage and ensure long-term savings.
• We often save customers time and money versus independent shops by avoiding repeat visits and using factory-trained technicians.

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

• The light indicates the vehicle’s onboard diagnostic system detected a fault in emissions, engine, or related systems.
• Codes can range from minor (loose gas cap) to serious (misfires, catalytic converter issues) and affect performance or emissions.
• Immediate diagnosis at Toyota of Greenville pinpoints the cause and helps avoid costly downstream damage.
• Repairs done at a certified dealership protect warranty coverage and deliver better long-term value than patch repairs.
• We provide clear estimates and explain immediate and future savings associated with factory service and genuine parts.

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

• Diagnostics typically include a computerized scan and a technician inspection; prices vary by service scope.
• Toyota of Greenville frequently offers competitive diagnostic rates and service specials—check our service specials page for current offers.
• While independent shops may advertise lower upfront fees, our certified service often costs less long term by preventing incorrect repairs and preserving vehicle value.
• Any warranty-covered repairs must be performed at a certified dealership to maintain coverage and maximize savings.
• We provide transparent estimates before work begins and explain potential long-term savings from using genuine parts and factory-trained technicians.

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

• The most frequent causes include a loose or faulty gas cap, oxygen sensor issues, or ignition misfires.
• Emissions-related sensors and catalytic converter performance are common triggers if unaddressed.
• Early diagnosis at Toyota of Greenville prevents more costly repairs and maintains fuel efficiency and performance.
• Using our dealership ensures repairs follow factory specifications and preserves warranty benefits for long-term savings.
• We offer rapid diagnostics and explain repair urgency so you can make informed decisions about service and cost.