Service bulletins for the 2020 Ram 4500
A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.
569 on file from NHTSA, as of 2026-10-19.
By type
By component
By trouble code
Only bulletins with component: Electrical system are shown. Show all
| S1925000004 | 2020-04-06. Service bulletin. ELECTRICAL SYSTEM. Malfunction Indicator Lamp Illumination (MIL). Diagnostic Trouble Code (DTC) P203E ? Reductant Level Sensor 1 Circuit Intermittent-Erratic Set |
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| S1408000384 | 2020-04-06. Service bulletin. ELECTRICAL SYSTEM. Intelligent Battery Sensor-IBS Installation, Battery Charging Message, Start Stop Charging Warning Lamp Illuminated On Stop Start Equipped Vehicles |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.