# P203C on the 2015 Ram 4500

The bulletins listed name this code in NHTSA's summary, or are about the same components. A bulletin or a recall listed here may apply to the model year. None of it is a diagnosis.

Nobody has written a description of this code yet.

## Bulletins for this model year that name P203C

- [10229248](https://open.wenmarpro.com/bulletins/10229248), 2023-01-09: Diesel Exhaust Fluid \(DEF\) Level Gauge Inaccurate Or Stuck This bulletin involves verifying the correct DEF level in the tank and if necessary, replacing the DEF pump module. A small number of customers may comment that their DEF level gauge is stuck for long periods of time or is erratic. The customer may also experience a Malfunction Indicator Lamp \(MIL\) illumination. Upon further investigation a technician may find one or more of the following Diagnostic Trouble Codes \(DTCs\). ? P203B \- Reductant Level Sensor Circuit Performance ? P203C \- \(Diesel Exhaust Fluid\) Reductant Level Sensor Circuit Low. ? P203D \- \(Diesel Exhaust Fluid\) Reductant Level Sensor Circuit High.
- [10148965](https://open.wenmarpro.com/bulletins/10148965), 2018-11-26: Diesel Exhaust Fluid \(DEF\) Level Sensor Manufacturing Defect This bulletin involves replacing the DEF pump module. A manufacturing defect in the level sensor may have occurred, if the level sensor was built within the time frame listed above. There may be a Malfunction Indicator Lamp \(MIL\) illuminated. Upon further investigation a technician may find one or more of the following Diagnostic Trouble Codes \(DTCs\). ? P203B \- Reductant Level Sensor Circuit Performance. ? P203C \- \(Diesel Exhaust Fluid\) Reductant Level Sensor Circuit Low. ? P203D \- \(Diesel Exhaust Fluid\) Reductant Level Sensor Circuit High.
- [10148941](https://open.wenmarpro.com/bulletins/10148941), 2018-11-26: Diesel Exhaust Fluid \(DEF\) Level Gauge Inaccurate Or Stuck This bulletin involves verifying the correct DEF level in the tank and if necessary, replacing the DEF pump module. A small number of customers may comment that their DEF level gauge is stuck for long periods of time or is erratic. The customer may also experience a Malfunction Indicator Lamp \(MIL\) illumination. Upon further investigation a technician may find one or more of the following Diagnostic Trouble Codes \(DTCs\). ? P203B \- Reductant Level Sensor Circuit Performance ? P203C \- \(Diesel Exhaust Fluid\) Reductant Level Sensor Circuit Low. ? P203D \- \(Diesel Exhaust Fluid\) Reductant Level Sensor Circuit High.