Check Engine Light Flashing

A flashing check engine light in a 2012 Ram 3500 signals a serious condition—often active misfire or a fault that can damage the catalytic converter or particulate filter. For heavy-duty diesels and trucks used for towing around Denver, immediate attention is critical. At Larry H. Miller Chrysler Dodge Ram FIAT Denver, our technicians use factory-grade scanners to capture freeze-frame data and perform targeted tests to determine if the issue is electrical, ignition, fuel-delivery related, or tied to emissions components. In many cases, a battery that is weak or failing will cause intermittent faults and electrical anomalies that can appear as a flashing light. We provide complete battery testing, charging system checks, and same-day replacements with OEM batteries designed to meet the 2012 Ram 3500’s demands.

Our service center prioritizes fast diagnosis and clear recommendations—minimizing downtime and the risk of expensive downstream repairs. We regularly run service promotions; check our service specials for current discounts. Because warranty-covered repairs must be done at a certified dealership, choosing our service department protects your warranty and long-term ownership value. We also offer service financing options so you can get repairs immediately and pay over time. To protect your truck and towing capability, schedule service online or call our team to arrange an expedited appointment.

2012 Ram 3500 Check Engine Light Reset

Resetting the check engine light on a 2012 Ram 3500 is straightforward when the underlying issue is resolved, but clearing codes without repair only masks problems. Our technicians reset codes after repairs and verify that the fix is permanent through road tests and follow-up scans. We emphasize transparency—providing a detailed estimate, parts options (OEM vs. aftermarket), and the expected longevity of repairs. Using OEM parts and factory procedures preserves your truck’s performance, towing capacity, and resale value. Our certified techs document repairs so warranty coverage remains intact; any warranty work must be performed at a certified dealership to remain valid.

For battery services and replacements, we stock batteries suited for diesel starting demands and perform load tests to confirm the issue before replacing. That saves you money by avoiding unnecessary parts. We often cost less than independent shops when you factor in diagnostic accuracy, genuine parts, and long-term savings from preventing repeat failures. Review our current offers on the service specials page and schedule service today—our team at Larry H. Miller Chrysler Dodge Ram FIAT Denver will get you back on the road quickly and with confidence.

2012 Ram 3500 Check Engine Light Codes

Common codes for a 2012 Ram 3500 include P0420 (catalyst efficiency), P0201–P0206 (injector circuit faults), P0102 (MAF circuit low), and glow plug or EGT-related codes in diesel systems. Each code has potential costs if left unaddressed: an unresolved injector fault can lead to poor fuel economy and injector replacement costs; a failed catalytic or particulate filter may require expensive cleaning or replacement; MAF or sensor issues reduce power and towing reliability. At Larry H. Miller Chrysler Dodge Ram FIAT Denver in Denver, CO, our approach is diagnostic-first: we identify the precise failed component, explain repair options, and show how prompt service prevents costlier repairs in the future.

We pair experienced technicians, OEM parts, and transparent estimates to maximize uptime and minimize total cost of ownership. For owners concerned about immediate outlays, we offer service financing and run periodic service specials. Whether you need a battery replacement, charging system repair, or a full diagnostic for engine management codes, schedule service online or visit Larry H. Miller Chrysler Dodge Ram FIAT Denver for dependable, efficient service you can trust.