Volvo All Engines (2017 Emissions) Fault Code: P119E12 PID: EMS Volvo Compression Brake (VCB) Control Highside Circuit
Volvo All Engines (2017 Emissions) Fault Code: P119E12 PID: EMS Volvo Compression Brake (VCB) Control Highside Circuit
Circuit description
The Engine Compression Brake Relay is supplied battery voltage through a fuse when the Engine Control Module (ECM) Relay is energized.
The Engine Control Module (ECM) grounds and completes the circuit for the Engine Compression Brake Relay to activate the compression brake.
Conditions for diagnostic trouble code (DTC)
Short circuit to battery voltage on A14.EB:30
Diagnostic operating conditions
Ignition key in ON position
Observable symptoms
Reduced engine braking since the compression brake cannot be activated
Reduced gear selection performance for some automatic transmissions
Probable cause
1) Connector
2) Short circuit in the compression brake solenoid valve
3) Wiring harness
4) Engine control module (ECM)
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