Volvo All Engines (2013 Emissions) Fault Code: P203C00 PID: ACM Aftertreatment Reagent Level Short Circit Low

Volvo All Engines (2013 Emissions) Fault Code: P203C00 PID: ACM Aftertreatment Reagent Level Short Circit Low

Aftertreatment diesel exhaust fluid (DEF) tank, Level Sensor.
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)
Short circuit to lower voltage

Observable symptoms
The Aftertreatment diesel exhaust fluid (DEF) tank level gauge remains permanently at the minimum level

Probable cause
1) Aftertreatment diesel exhaust fluid (DEF) tank, Level Sensor.