Frequently Asked Questions

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

• It signals your vehicle’s onboard diagnostics detected an issue — from emissions components and sensors to battery or charging faults. A lit lamp doesn’t always equal immediate danger, but it does mean your 2026 Toyota Sienna needs professional attention to prevent more costly repairs down the road.
• At Larry H. Miller Toyota Peoria our factory-trained technicians use OEM-grade tools to diagnose the root cause, which often saves you time and money versus guesswork. We frequently find simple fixes such as a loose gas cap, a failing sensor, or a weak battery that, when addressed quickly, protect long-term vehicle value.
• We offer transparent pricing, service financing so you can get repairs now and pay later, and available service specials to reduce immediate costs while delivering genuine OEM parts and warranty-backed repairs.

How long does a check engine light service take?

• Most diagnostics are completed within an hour, though repairs vary. Minor repairs or battery replacements may be done same day; more involved repairs that require parts can take longer.
• Larry H. Miller Toyota Peoria prioritizes quick turnaround with clear estimates and efficient workflow—our certified technicians work to minimize downtime and maximize reliability for your 2026 Toyota Sienna.
• To get your vehicle back on the road fast, schedule service online and ask about loaner options, shuttle service, and our service financing plans.

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

• Diagnostics vary by issue, but our dealership often costs less than independent shops while delivering factory training, OEM parts, and warranty protection—helping you avoid repeat repairs and saving you money over time.
• We provide straightforward estimates before work begins and show you how timely service and genuine parts lower long-term ownership costs. Ask about current service specials to reduce your out-of-pocket expense.
• Financing options are available so you can complete recommended repairs immediately without delaying necessary work that protects vehicle longevity.

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

• Common causes include faulty oxygen sensors, loose gas caps, failing catalytic components, or issues with the charging system such as a weak battery or alternator output.
• Addressing these early at Larry H. Miller Toyota Peoria prevents escalation into costly repairs — our technicians will recommend OEM parts and warranty-backed repairs when needed.
• We also recommend regular battery checks and replacements as part of routine service to prevent no-start conditions and protect sensitive electronics.

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

• Start with safety: if the light is flashing, pull over safely and minimize engine load. Otherwise, check for obvious issues like a loose fuel cap, low fluid warnings, or unusual noises.
• Then let our certified team perform a full diagnostic—our experience with the 2026 Toyota Sienna means faster, more accurate results and the right repair the first time.
• When you’re ready, schedule appointment online or call Larry H. Miller Toyota Peoria for same-day options and to learn about our service specials.