VOLVOUU All Engines (2017 Emissions) Fault Code: P20C111 PID: ACM Reductant Heater “C” Control

VOLVOUU All Engines (2017 Emissions) Fault Code: P20C111 PID: ACM Reductant Heater “C” Control

Conditions for diagnostic trouble code (DTC)
The voltage at pin A137:24 is below normal value

Observable symptoms
Ammonia smell can occur if the aftertreatment diesel exhaust fluid (DEF) warmed too much

Probable cause
1) Short circuit to ground, Control wire (-)
2) Wiring harness
3) Aftertreatment Diesel Exhaust Fluid (DEF) Line Heater 3