Frequently Asked Questions

What does it mean when the check engine light comes on in a 2018 Ram Promaster Window Van 3500 High Roof?

• It indicates the vehicle’s engine management system detected an issue — anything from a loose gas cap to a failing catalytic converter. Our Denver service team pinpoints the cause using factory-grade diagnostic tools.
• We inspect related systems including the battery and charging system; many battery or charging faults first appear as engine or electrical warnings.
• Repairing issues promptly often saves money over time: early intervention prevents collateral damage and can improve fuel economy and reliability.
• All warranty-covered repairs must be completed at a certified dealership. We accept service financing so you can get service now and pay later.

How long does a check engine light service take?

• Typical diagnostics are completed within an hour; full repairs vary by needed parts and complexity. Our goal at Larry H. Miller Chrysler Dodge Ram FIAT Denver is fast turnaround without sacrificing quality.
• We offer quick battery testing and same-day replacements for common sizes, and we stock OEM parts to reduce wait times.
• To minimize downtime, schedule service online and review current service specials before arrival.

How much does a check engine light diagnostic cost for a 2018 Ram Promaster Window Van 3500 High Roof?

• Our diagnostic fees are competitive and often cost less than many independent shops while delivering factory-trained technicians and OEM parts.
• Choosing Larry H. Miller Chrysler Dodge Ram FIAT Denver provides immediate and long-term savings — accurate diagnostics prevent unnecessary repairs and uphold your vehicle’s longevity.
• We also offer service financing options to help spread the cost and provide transparency on estimates before any work begins.

What is the most common reason for check engine light on a 2018 Ram Promaster Window Van 3500 High Roof?

• Common causes include oxygen sensor faults, loose fuel caps, catalytic converter issues, EVAP system faults, and battery/charging problems.
• Many of these start small; addressing them at our Denver service center preserves fuel economy and prevents more costly repairs.
• We document findings clearly and honor warranty coverage for eligible repairs performed at our certified facility.

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

• Start by checking the battery connections and fuel cap tightness; then bring the vehicle to our dealership for an accurate scan and inspection.
• Our technicians use OEM diagnostic procedures to identify the root cause and recommend only necessary repairs, often revealing immediate and long-term savings.
• To get prioritized service, schedule appointment online and check current service specials.

Check Engine Light Flashing

A flashing check engine light on a 2018 Ram Promaster Window Van 3500 High Roof signals a potentially severe fault — often indicating misfires that can damage the catalytic converter or create unsafe driving conditions. When a light is flashing, stop driving if safe and have the vehicle inspected immediately by our certified technicians at Larry H. Miller Chrysler Dodge Ram FIAT Denver. Our Denver service center prioritizes flashing-light cases, performing a rapid triage that assesses ignition components, fuel delivery, emissions systems, and battery/charging condition. We explain recommended repairs in plain language and provide transparent estimates. Take advantage of our known service specials, OEM replacement parts, and available service financing so you can address urgent repairs now and pay over time. Contact us or schedule service online for a fast appointment and to protect your vehicle and wallet.

2018 Ram Promaster Window Van 3500 High Roof Check Engine Light Reset

Resetting an engine light on a 2018 Ram Promaster Window Van 3500 High Roof without diagnosing the cause can mask persistent faults and risk further damage. At Larry H. Miller Chrysler Dodge Ram FIAT Denver, we recommend a full diagnostic before any reset so the underlying issue is fixed, not hidden. Our service includes a digital printout of codes, step-by-step repair recommendations, and use of OEM parts that preserve vehicle performance and warranty eligibility. Choosing our dealership rather than an independent shop means access to factory-trained technicians, certified procedures, and documented repairs that help maintain resale value. We also offer clear cost estimates, the option to review available service specials, and service financing to make necessary repairs manageable. To ensure a long-term fix, schedule appointment with our team and we’ll handle the reset only after repairs are completed.

2018 Ram Promaster Window Van 3500 High Roof Check Engine Light Codes

Common check engine light codes for a 2018 Ram Promaster Window Van 3500 High Roof include misfire codes (P0300–P0308), oxygen sensor faults (P0130–P0167), and EVAP or fuel system codes. Each unresolved code carries a cost: misfires can ruin a catalytic converter (thousands of dollars if ignored), oxygen sensor failures reduce fuel economy and emissions compliance, and EVAP faults can lead to reduced performance and failed emissions tests. At Larry H. Miller Chrysler Dodge Ram FIAT Denver our certified techs decode the exact code, explain repair options, and estimate costs so you can make an informed choice. We emphasize convenience with online scheduling, comfortable waiting areas, and OEM parts backed by warranty. Check our service specials and schedule service today to address codes early and protect your investment.