Frequently Asked Questions

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

• It flags a range of issues from minor (loose gas cap, evaporative system leak) to major (catalytic converter, ignition misfire). Our factory-trained technicians at Larry H. Miller Toyota Peoria diagnose the code and recommend the correct repair using OEM parts to protect engine life and resale value.
• Choosing our dealership often costs less than independent shops when you factor immediate fixes, accurate diagnostics and long-term savings from correct repairs. We focus on reducing return visits and preventing costly secondary damage.
• Warranty-covered repairs must be performed at a certified dealership to preserve coverage; we’re factory certified and transparent about repairs and pricing.
• We offer service financing so you can get the work done now and pay later, and you can schedule service online at your convenience.

How long does a check engine light service take?

• Diagnostics typically take 30–90 minutes depending on symptoms and whether we need road testing; many simple codes are resolved same-day at Larry H. Miller Toyota Peoria in Peoria, AZ.
• If battery testing or replacement is required (a weak battery can cause charging-related codes), we can often replace the battery same day using OEM or equivalent replacements for the 2020 Toyota Highlander.
• We prioritize quick turnaround without cutting corners: factory tools, genuine parts and certified technicians reduce repeat visits and provide long-term value.
• To reserve a time, schedule appointment or check our current service specials for discounted maintenance.

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

• Costs vary by repair needed; a code scan is competitively priced and, when combined with recommended repairs, our bundled pricing and promotions often deliver immediate savings versus repeat independent repairs.
• Because we use OEM parts and certified technicians, you save long-term by avoiding misdiagnoses that lead to additional repairs. Warranty work must be done at a certified dealership to remain valid.
• We provide transparent estimates before any work and offer service financing to help spread payments while protecting your vehicle’s value and reliability.
• See current offers and discounts on our service specials, then schedule service online.

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

• Common causes include loose/faulty gas caps, oxygen sensor failures, catalytic converter wear, and ignition misfires. Many of these can be caught early with proper diagnostics and battery/charging checks.
• Ignoring codes can escalate repair costs — for example, an unaddressed oxygen sensor can damage a catalytic converter, dramatically increasing repair expense.
• At Larry H. Miller Toyota Peoria we perform thorough inspections and explain immediate and long-term savings from timely repair and maintenance.
• Book a diagnostic to protect your Highlander’s longevity and performance; schedule appointment today.

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

• Start with simple checks: tighten the gas cap, note recent fuel or performance issues, and check battery/charging if electronics are acting up. A weak battery or charging system can trigger codes.
• Our technicians use OEM diagnostic procedures tailored to the 2020 Toyota Highlander, ensuring accurate troubleshooting and saving you money over time by preventing misdiagnosis.
• If a repair is needed, performing it at a certified dealership preserves warranties and ensures use of genuine parts; we also offer service financing to make repairs manageable.
• To get precise answers and same-day attention, schedule service and review our service specials.