Volvo All Engines (2010 Emissions) Fault Code: SPN 3512 FMI 4 PID: PSID 126 Sensor Supply Voltage 4
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):
1) The voltage at pin A137:51 is less than 4.5?V
Observable symptoms
1) None
Probable cause
1) Wiring harness
2) Connector
3) A138, Aftertreatment DEF Dosing Pressure
4) A137: Aftertreatment Control Module (ACM)
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