VOLVOUU All Engines (2013 Emissions) Fault Code: P203D00 PID: ACM Aftertreatment Reagent Level Short Circit High

VOLVOUU All Engines (2013 Emissions) Fault Code: P203D00 PID: ACM Aftertreatment Reagent Level Short Circit High

Circuit description
Aftertreatment Diesel Exhaust Fluid (DEF) Tank, Level Sensor has an indicator lamp and gauge in the instrument cluster. A solid lamp comes on when there is approximately 16% DEF remaining in the tank. A flashing lamp indicates when there is approximately 4% DEF remaining in the tank. A 25% engine derate is possible if the DEF is not refilled above the red line on the gauge at the next engine start up.

Conditions for diagnostic trouble code (DTC)
Voltage above normal or shorted high

Probable cause
1) Connector
2) Wiring harness
3) Short circuit to battery voltage, Signal wire
4) Short circuit to 5V, Signal wire
5) Aftertreatment diesel exhaust fluid (DEF) tank, Level Sensor, Temperature Sensor