VOLVOUU All Engines (2017 Emissions) Fault Code: P047800 PID: EMS Exhaust Pressure Control Valve “A” High
Conditions for diagnostic trouble code (DTC):
1) Short circuit to battery voltage on A14.EB:38
Diagnostic operating conditions
1) Ignition key in ON position
Observable symptoms
1) The exhaust brake does not function
2) The heat retention function is not working
3) Low Power
Probable cause
1) Short circuit to battery voltage, Control wire
2) Short circuit in control valve
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