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Volvo All Engines (2013 Emissions) Fault Code: U300A12 PID: ACM Key Position

Volvo All Engines (2013 Emissions) Fault Code: U300A12 PID: ACM Key Position

Circuit description
When the ignition key is switched to the RUN position, battery voltage is supplied though fuse 64 to the aftertreatment control module (ACM).

Conditions for diagnostic trouble code (DTC)
Ignition switch voltage shorted high

Probable cause
1) Chassis Harness
2) Cab harness

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