Volvo All Engines (2017 Emissions) Fault Code: P115900 PID: EMS Reductant Control Module Sensor Power Supply “B” Circuit Low
Volvo All Engines (2017 Emissions) Fault Code: P115900 PID: EMS Reductant Control Module Sensor Power Supply “B” Circuit Low
Circuit description
The control module provides the following sensors with 5V supply voltage
A138, Aftertreatment DEF Dosing Pressure
If an abnormal voltage or current is detected on the common supply a DTC is set
Conditions for diagnostic trouble code (DTC)
The voltage at pin A137:51 is less than 4.5 V
Observable symptoms
None
Probable cause
1) Wiring harness
2) Connector
3) Aftertreatment DEF Dosing Pressure Sensor
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