Frequently Asked Questions

What does it mean when the check engine light comes on in a 2020 Ford Expedition MAX?

• The check engine light signals your vehicle’s onboard diagnostic system has detected an issue — anything from a loose gas cap to an emissions or sensor fault. Our certified technicians at Larry H. Miller Ford Mesa in Mesa, AZ, use OEM-grade scanners to pinpoint the cause quickly.
• Choosing our dealership often costs less than independent shops because we combine transparent pricing, factory-trained technicians, and diagnostic efficiency that reduces labor time and long-term repair needs — saving you money now and later.
• Repairs covered under warranty must be performed at a certified dealership to maintain coverage; we honor warranty requirements and document repairs thoroughly for long-term value.
• We offer service financing so you can get service now and pay later. To get started, schedule service or review current service specials.

How long does a check engine light service take?

• Diagnostic time typically ranges from 30 minutes to 2 hours depending on code complexity and whether road testing is needed. Our Mesa service lanes prioritize speed without sacrificing accuracy.
• If parts or additional repairs are required, we’ll provide a clear estimate and timeline. Using OEM parts and direct dealer resources means faster parts availability and fewer return visits.
• Because our technicians are Ford-certified, many diagnostics and straightforward repairs are completed the same day — which lowers your downtime and overall cost compared with repeated visits.
• Ready to book? Schedule appointment now and check current service specials.

How much does a check engine light diagnostic cost for a 2020 Ford Expedition MAX?

• Diagnostic fees vary by issue, but Larry H. Miller Ford Mesa provides transparent, competitive pricing and often costs less than independent shops when you factor in accurate diagnostics and reduced follow-up repairs.
• We’ll explain any recommended repairs and how fixing a problem promptly prevents more expensive damage — demonstrating immediate and long-term savings.
• Remember: warranty-covered diagnostics and repairs should be completed at a certified dealership to protect your coverage and vehicle value.
• We also offer service financing so you can address necessary work now and pay over time. To learn more or to schedule service, visit our service center or view service specials.

What is the most common reason for check engine light on a 2020 Ford Expedition MAX?

• Common causes include loose fuel caps, oxygen sensor faults, catalytic converter issues, mass airflow sensor problems, and misfires. Our Mesa, AZ shop commonly sees sensor and emissions-related codes on this model.
• Left unaddressed these issues can reduce fuel economy, increase emissions, and lead to expensive repairs — so early diagnosis at our dealership saves money and extends vehicle life.
• Our factory-trained technicians use Ford-specific tools to identify the root cause quickly and recommend cost-effective OEM repairs when needed.
• Book a fast, reliable check with our team: schedule appointment and check available service specials.

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

• Start with simple checks: make sure the gas cap is tightened. If the light persists, avoid delay — drive to a certified shop for a proper scan to prevent escalation.
• At Larry H. Miller Ford Mesa we perform careful scans and road tests to distinguish urgent issues from non-critical codes and explain options clearly, so you save both time and money.
• Warranty-covered repairs must be done at a certified dealership to keep coverage valid; our team will document and complete any covered work promptly.
• We offer service financing to help manage unexpected repairs. To act quickly, schedule service or view our latest service specials.