Frequently Asked Questions

What does it mean when the check engine light comes on in a 2018 Ford Shelby GT350 R?

• It signals the vehicle's onboard diagnostics has detected an issue with emissions, engine management, or related sensors. Issues can range from a loose gas cap to a failing oxygen sensor or ignition component.
• At David McDavid Ford in Texas, our factory-trained technicians use OEM-grade scanners to pinpoint codes quickly, helping you avoid unnecessary parts replacement and saving you money over time.
• When repairs are covered under warranty, they must be completed at a certified dealership to preserve coverage; our team will verify warranty eligibility and explain options.
• We offer service financing so you can get the necessary repairs now and pay later, minimizing downtime and protecting long-term vehicle value.
• To get a precise diagnosis, schedule service online or review current service specials before you arrive.

How long does a check engine light service take?

• Diagnostics for a check engine light typically take 30–90 minutes, depending on code complexity and whether road testing is needed for intermittent issues.
• At David McDavid Ford, our efficient process and certified techs prioritize speed without sacrificing accuracy — we often complete diagnostics faster than independent shops while delivering superior documentation and OEM-quality repairs.
• If parts or repairs are required, we'll provide an upfront estimate, outline immediate and long-term savings from using OEM parts, and explain warranty coverage.
• Service financing is available to help manage larger repairs so you can address issues promptly and avoid escalating costs from delayed maintenance.
• You can schedule service online and check available service specials to maximize value.

How much does a check engine light diagnostic cost for a 2018 Ford Shelby GT350 R?

• Pricing varies by issue, but initial diagnostics at our dealership are competitively priced and often cost less than many independent shops — especially when you factor warranty coverage, certified technicians, and included re-checks.
• Our pricing emphasizes transparency; you'll receive a clear estimate before any repairs are started, and we explain how timely diagnostics reduce long-term repair costs and protect resale value.
• When covered by warranty, repairs must be completed at a certified dealership to maintain coverage; we’ll guide you through that process and handle warranty documentation.
• We also offer service financing to split larger repair costs over time so you can get the work done immediately and avoid further damage.
• To learn current diagnostic specials and book an appointment, view service specials or schedule service now.

What is the most common reason for check engine light on a 2018 Ford Shelby GT350 R?

• The most frequent causes are oxygen sensor failure, catalytic converter issues, misfires, or issues with mass airflow or fuel trim — anything that affects emissions or combustion efficiency.
• If left unaddressed, these faults can reduce fuel economy, lower engine performance, and cause costly secondary damage; our dealership emphasizes quick diagnosis to prevent escalation and protect your Shelby's high-performance engine.
• Repairs completed with OEM parts by certified technicians help retain vehicle longevity and performance, and warranty work must be done at a certified dealer to remain valid.
• We offer clear estimates, maintenance updates, and service financing so you can make the right decision for immediate and long-term savings.
• Book service online via schedule service or check our service specials for current offers.

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

• Start with simple checks: ensure the gas cap is secure — a loose or damaged cap is a common trigger and an inexpensive fix. If the light remains, diagnostics are the next step.
• Bring the vehicle to David McDavid Ford for a full code read; our technicians verify the code, inspect related components, and perform targeted tests to identify root causes quickly.
• Choosing dealership service often results in immediate and long-term savings through accurate diagnosis, OEM parts, and warranty protection versus trial-and-error repairs.
• Service financing is available for necessary repairs so you can address the issue now and avoid more expensive damage later.
• To get started, schedule service or review our service specials for current pricing incentives.