Check Engine Light Flashing

The check engine light flashing on a 2017 Ram 3500 usually indicates an active misfire or another condition that risks imminent damage to the catalytic converter or engine. A flashing light is a higher-priority alert than a steady lamp — it demands immediate attention. At Larry H. Miller Chrysler Dodge Ram FIAT Denver in Denver, CO, our certified technicians perform a prioritized diagnostic to prevent expensive follow-on repairs, such as converter replacement or severe cylinder damage. We combine quick in-bay inspection with road testing and OEM parts when needed. If a repair is required, we present a clear estimate and explain immediate vs. long-term options so you can decide with confidence. We also provide service financing to help you address urgent repairs now and pay over time. Check current service specials and schedule service online for fast, reliable care from factory-trained techs.

2017 Ram 3500 Check Engine Light Codes

Common codes for a 2017 Ram 3500 include P0300 (random/multiple cylinder misfire), P0420 (catalyst system efficiency below threshold), P0171/P0174 (system too lean), and P0455 (EVAP large leak). Each code points to different risks and costs if left unresolved: misfires can cause catalytic converter failure and reduced performance; a P0420 can escalate to converter replacement costing over $1,000; EVAP leaks reduce fuel efficiency and may cause emissions failures. At Larry H. Miller Chrysler Dodge Ram FIAT Denver we use OEM diagnostic tools to interpret codes accurately, differentiate sensor faults from true mechanical issues, and prevent unnecessary parts replacement. Our certified techs prioritize repairs that deliver immediate savings and long-term reliability, and we clearly outline estimated costs, timelines, and warranty protections before any work begins. To get the right diagnosis and avoid compounding repair bills, schedule service and review our current service specials.

2017 Ram 3500 Check Engine Light Reset

Resetting the check engine light on a 2017 Ram 3500 is possible with an OBD-II scanner, but resetting without addressing the underlying fault can mask serious problems and lead to repeated failures. At Larry H. Miller Chrysler Dodge Ram FIAT Denver we recommend a full diagnostic so resets only follow confirmed repairs. Our service approach is transparent: you receive a plain-language explanation, OEM parts when replacements are needed, and a written estimate. We honor warranty requirements — repairs covered under warranty must be completed at a certified dealership to keep coverage valid — and we offer service financing to reduce up-front cost barriers. Choosing dealership service often means fewer repeat visits and better long-term value compared with some independent shops. Before you clear codes yourself, consider the benefits of factory-trained technicians and schedule a professional schedule service appointment or view our service specials for current savings.