Frequently Asked Questions

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

• Typical diagnostics at Toyota of Greenville begin with a comprehensive scan and inspection; many diagnostics are competitively priced and often cost less than independent shops while delivering factory-level service.
• If repairs are needed, we emphasize immediate and long-term savings through correct repairs, genuine parts, and efficient labor—reducing repeat visits and protecting resale value.
• Any repairs covered under warranty must be performed at a certified dealership to preserve coverage; our technicians are factory-trained to ensure warranty compliance.
• Ask about current service specials at https://www.toyotaofgreenville.com/specials/service.htm for additional savings.

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

• Start with simple checks: ensure the gas cap is tightened securely after refueling; a loose cap is a common trigger.
• Verify fuel level and note any recent fill-ups or changes in fuel quality that could affect operation.
• Listen and look for obvious issues such as rough idle, loss of power, or fluid leaks before driving far.
• If the light persists, bring your 2025 Toyota Sienna to Toyota of Greenville for a professional diagnosis using OEM tools and factory-trained technicians.

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

• The light signals a detected fault in emissions, engine, or control systems; it ranges from minor fixes to urgent engine issues.
• Common causes include a loose gas cap, oxygen sensor faults, EVAP leaks, misfiring cylinders, or catalytic converter problems.
• Severity varies—some faults are non-urgent, others require immediate attention to avoid damage and higher repair costs.
• Bring your vehicle to Toyota of Greenville for a complete scan; our certified diagnostics identify the cause and the right corrective action.

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

• The single most frequent trigger is a loose or faulty gas cap causing an EVAP system fault—an easy fix that often clears the light.
• Other common reasons include oxygen sensor degradation, ignition misfires, and catalytic converter efficiency issues that need inspection.
• Timely diagnosis at a certified dealership prevents escalation and often results in lower overall repair costs compared with deferred fixes.
• Our technicians can verify causes quickly and advise on immediate and long-term maintenance to protect your investment.

How long does a check engine light service take?

• Basic diagnostics typically take 30–60 minutes for a full scan and technician inspection; more complex faults can require additional testing.
• If parts or repairs are needed, total service time depends on parts availability; Toyota of Greenville stocks common OEM parts and can often complete repairs faster.
• Our factory-trained team works efficiently to minimize downtime, and accurate diagnostics reduce repeat visits—saving you time and money in the long run.
• Schedule online at https://www.toyotaofgreenville.com/new-inventory/index.htm or call our service department to confirm timing and availability.