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Ram TSB #1400323
2021 Ram 4500
TSB Document:
Affected Component: ELECTRICAL SYSTEM
- Summary
- Diesel Exhaust Fluid (DEF) Fluid Freezing Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find the following Diagnostic Trouble Code (DTC) has been set: ? P203E-00 - Reductant Level Sensor 1 Circuit Intermittent-Erratic. This bulletin involves replacing the urea delivery module and grade vent valve and updating the Dosing Control Unit (DCU) software.
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