Frequently Asked Questions

What does it mean when the check engine light comes on in a 2020 Ford F-450 Super Duty?

• It signals that the vehicle's onboard diagnostics have detected an issue — anything from a loose gas cap or sensor fault to emissions or engine problems.
• Common causes include turbocharger sensors, exhaust aftertreatment, fuel system irregularities, or EGR/DPF issues specific to diesel 6.7L engines.
• Bringing your truck to Larry H. Miller Ford Mesa in Mesa, AZ ensures factory-trained technicians read codes with OEM-grade scanners and diagnose the root cause quickly.
• Our service offers immediate and long-term savings by preventing minor issues from becoming costly repairs — and warranty-covered repairs must be done at a certified dealership to remain valid.
• We offer service financing so you can get the necessary repairs now and pay later. To act fast, schedule service online and check our service specials.

How long does a check engine light service take?

• Diagnosis typically takes between 30–90 minutes, depending on symptoms and whether a road test or multiple system checks are required.
• Repairs vary: simple sensor or harness fixes can be same-day, while parts-intensive repairs or emissions work may need longer — our team gives clear time estimates before work begins.
• At Larry H. Miller Ford Mesa we streamline service with OEM parts, express lanes when available, and clear communication so you know expected turnaround and total costs up front.
• We emphasize immediate and long-term savings by using genuine Ford parts and certified procedures that preserve performance and resale value.
• To arrange fast, reliable service, schedule service and browse current service specials.

How much does a check engine light diagnostic cost for a 2020 Ford F-450 Super Duty?

• Diagnostic fees can vary, but at Larry H. Miller Ford Mesa our pricing is competitive and often costs less than independent shops when you factor in accurate diagnosis, OEM parts, and warranty protections.
• We focus on transparent estimates and explain immediate and long-term savings — correct diagnosis prevents repeat visits and avoids unnecessary parts replacement.
• If repairs are required and covered under warranty, they must be performed at a certified dealership to preserve coverage; our technicians are Ford-certified for the 6.7L diesel engine.
• We offer service financing options so you can address diagnostics and repairs now while paying over time. To plan your visit, schedule appointment and view available service specials.

What is the most common reason for check engine light on a 2020 Ford F-450 Super Duty?

• For diesel Super Duty trucks, common triggers include emissions control components (DPF or SCR systems), turbocharger sensors, or fuel delivery irregularities.
• Early diagnosis at Larry H. Miller Ford Mesa helps avoid escalation into expensive turbo or aftertreatment replacement — preserving towing performance and vehicle longevity.
• Our certified technicians use OEM diagnostic tools to pinpoint the issue and provide cost-effective repair plans that emphasize long-term value.
• We often provide service financing and will highlight any available service specials to lower your out-of-pocket expense.
• To reduce downtime and protect your truck’s capability, schedule service promptly when the light appears.

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

• Start with basic checks: ensure secure fuel and fluid caps, verify fluid levels, and note any abnormal sounds, smoke, or loss of power.
• Because diesel 6.7L systems are complex, the best next step is a professional scan — our dealership uses OEM scanners that read all Ford-specific codes and freeze-frame data.
• We focus on accurate diagnosis to prevent unnecessary part swaps and to maximize immediate and long-term savings; warranty-covered repairs must be done at certified dealerships like ours.
• We also offer service financing so necessary repairs don’t wait; to get started, schedule service and review current service specials.