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Volvo All Engines (2013 Emissions) Fault Code: P266912 PID: ACM Actuator Supply Voltage “B”

Volvo All Engines (2013 Emissions) Fault Code: P266912 PID: ACM Actuator Supply Voltage “B”

Circuit description
The following components are connected to a common 12?V supply
R31: Aftertreatment Diesel Exhaust Fluid (DEF) Line Heater 1- 2
R29: Aftertreatment Diesel Exhaust Fluid (DEF) Line Heater 3
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 A137.59 is above normal value

Observable symptoms
None

Probable cause
1) Wiring harness
2) Connector
3) Aftertreatment Diesel Exhaust Fluid (DEF) Line Heater 1
4) Aftertreatment Diesel Exhaust Fluid (DEF) Line Heater 3