Make: Volvo
Engine: All Engines (2017 Emissions)
Fauld Code: P040341
PID: EMS
SPN: N/A
FMI: N/A
Description: EGR “A” Control
Troubleshooting:
The EGR Valve operation is controlled by the Engine Control Module (ECM) using a pulse
width modulated signal. The ECU provides both the power and ground circuits. The EGR
Valve assembly consists of a solenoid, operating a valve by hydraulic pressure provided by the
engine’s oiling system.
Conditions for diagnostic trouble code (DTC):
1) Internal fault in component
Observable symptoms
1) Loss of power
Probable cause
1) EGR Valve
Make: Volvo
Engine: All Engines (2017 Emissions)
Fauld Code: P040A01
PID: EMS
SPN: N/A
FMI: N/A
Description: Exhaust Gas Recirculation Temperature Sensor “A”
Troubleshooting:
Conditions for diagnostic trouble code (DTC):
1) Open circuit on signal wire
Observable symptoms
1) None
Probable cause
1) Connector
2) Open circuit in cable harness
3) Open circuit in component
Make: Volvo
Engine: All Engines (2017 Emissions)
Fauld Code: P047013
PID: EMS
SPN: N/A
FMI: N/A
Description: Exhaust Pressure Sensor “A”
Troubleshooting:
The Engine Coolant Temperature Sensor is a thermistor. The resistance of the Engine Coolant
Temperature Sensor changes inversely to the temperature of the engine coolant. When the
coolant is cold, the sensor resistance is high. As the temperature of the coolant increases, the
sensor resistance decreases.
The Engine Control Module (ECM) monitors the voltage drop across the Engine Coolant
Temperature Sensor.
The coolant temperature signal is used to calculate fuel injection and to evaluate operating
conditions of the engine coolant temperature. Examples of conditions that may cause high
coolant temperature are: thermostat failure, fan failure, heavy load, high ambient temperatures
and radiator blockage.
The sensor’s signal is monitored by the Engine Control Module (ECM).
The engine control module (ECM) will set a diagnostic trouble code (DTC) and derate the
engine to avoid engine damage if the sensor signal is not within predetermined limits, or the
signal is not rational.
Conditions for diagnostic trouble code (DTC):
1) The voltage at pin A14.EB:12 is less than 0.2 V
Diagnostic monitor condition
1) Key in ON position
Observable symptoms
1) Engine brake, poor brake performance
Probable cause
1) Exhaust back pressure sensor
2) Open circuit, Signal wire
3) Short circuit to ground, Signal wire
4) Engine control module (ECM)
Make: Volvo
Engine: All Engines (2017 Emissions)
Fauld Code: P047F00
PID: EMS
SPN: N/A
FMI: N/A
Description: Exhaust Pressure Control Valve “A” Stuck Open
Troubleshooting:
Conditions for diagnostic trouble code (DTC):
1) Sensor value does not change with changing conditions
Observable symptoms
1) Engine brake, poor brake performance/Brake performance too high
Probable cause
1) Exhaust back pressure sensor
2) Leakage from hoses or connections
3) Clogged or blocked air system