Frequently Asked Questions

What does it mean when the check engine light comes on in a 2020 Toyota Avalon Hybrid?

• It signals that the vehicle’s onboard diagnostics has detected an emissions, fuel, ignition, or sensor issue — anything from a loose gas cap to a failing oxygen sensor.
• At Larry H. Miller Toyota Peoria we run a factory-level scan, diagnose causes precisely, and explain immediate versus long-term repair needs so you can make an informed choice.
• Our certified technicians use OEM parts and give transparent estimates that often cost less than independent shops when you factor in long-term reliability and fewer repeat repairs.
• We honor warranty terms: any repairs covered under warranty must be performed at a certified dealership to preserve coverage.
• We offer service financing so you can get needed repairs now and pay later; to book, please schedule service.

How long does a check engine light service take?

• Diagnostics typically take 30–90 minutes, depending on code complexity and road testing; straightforward fixes can often be completed the same day.
• Larry H. Miller Toyota Peoria prioritizes quick turnarounds with OEM parts on-hand, minimizing downtime for drivers in Peoria, AZ and the West Valley.
• We’ll provide a clear timeline and estimate before work begins and highlight immediate and long-term savings from doing the repair correctly the first time.
• To confirm availability and reduce wait time, schedule appointment online or check our current service specials before you come in.

How much does a check engine light diagnostic cost for a 2020 Toyota Avalon Hybrid?

• Diagnostic fees vary by complexity; at Larry H. Miller Toyota Peoria we offer competitive, transparent pricing and value-packed inspections that often cost less than independent shops when you include warranty-backed repairs.
• Our pricing includes professional code reading, visual inspection, and a technician consultation to walk you through fixes and expected long-term savings.
• Remember that warranty-covered repairs must be completed at a certified dealership to keep coverage valid — another long-term savings advantage of using our service center.
• We accept service financing to make necessary repairs affordable; to get started, please schedule service or review our service specials.

What is the most common reason for the check engine light on a 2020 Toyota Avalon Hybrid?

• Common causes include a loose or faulty gas cap, failing oxygen sensor, EVAP leaks, ignition misfires, or catalytic converter issues—each carries different repair costs and long-term consequences if ignored.
• Our certified technicians at Larry H. Miller Toyota Peoria diagnose the precise cause and explain potential downstream costs so you can avoid larger repairs later.
• We emphasize immediate and long-term savings by using OEM parts and factory-recommended procedures and by honoring warranty terms for covered repairs performed at our dealership.

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

• Start with obvious items: check the gas cap for tightness and visible damage, and note any change in drivability or warning behaviors (e.g., reduced power, vibrations).
• If basic checks don’t clear the light, bring your 2020 Toyota Avalon Hybrid to Larry H. Miller Toyota Peoria for a professional scan and diagnostic so issues are fixed correctly the first time.
• To minimize downtime, schedule service online — and be sure to browse our service specials for savings.