Volvo All Engines (2017 Emissions) Fault Code: P20EE00 PID: EMS SCR NOx Catalyst Efficiency Below Threshold (Bank 1)
Volvo All Engines (2017 Emissions) Fault Code: P20EE00 PID: EMS SCR NOx Catalyst Efficiency Below Threshold (Bank 1)
When the aftertreatment selective catalytic reduction (SCR) system operates under normal conditions, the aftertreatment control module (ACM) monitors diesel exhaust fluid (DEF) dosing valve duty cycle and DEF pump control value. When the DEF dosing valve duty cycle increases above allowed threshold and the DEF pump control value decreases below expected threshold, the ACM stops DEF dosing and reports a fault. The fault might be indication of electrical failure or blockage in DEF dosing valve or DEF supply line from the DEF tank.
Conditions for diagnostic trouble code (DTC):
1) Reduced NOx conversion
Observable symptoms
1) Too high NOx emissions
2) Engine de-rated
Probable cause
1) Clogged muffler
2) DEF Dosing
3) DEF concentration
-
-
-
-
-
-
-
-
-
-
-
-
Volvo Premium Tech Tool PTT 2.8.130 Diagnostic Software 04.2022 ACPI ( 1 PC )
Trucks software $143.00 -
-
-
Related products
-
Volvo All Engines (2004 Emissions) Fault Code: PID 412 FMI 0 EGR Temperature After Cooler
All Engines (2004 Emissions) -
Volvo All Engines (2004 Emissions) Fault Code: PPID 35 FMI 9 EGR Mass Flow Sensor
All Engines (2004 Emissions) -
Volvo All Engines (2004 Emissions) Fault Code: PID 158 FMI 3 Battery Voltage
All Engines (2004 Emissions) -
Volvo All Engines (2004 Emissions) Fault Code: PID 102 FMI 3 Boost Air Pressure / Temperature Sensor
All Engines (2004 Emissions) -
Volvo All Engines (2004 Emissions) Fault Code: PPID 55 FMI 5 ECU Temperature
All Engines (2004 Emissions) -
Volvo All Engines (2004 Emissions) Fault Code: PID 228 FMI 11 Calibration Factor
All Engines (2004 Emissions) -
Volvo All Engines (2004 Emissions) Fault Code: PID 252 FMI 9 Date Data Failure
All Engines (2004 Emissions) -
Volvo All Engines (2004 Emissions) Fault Code: PPID 35 FMI 3 EGR Mass Flow Sensor
All Engines (2004 Emissions) -
Volvo All Engines (2004 Emissions) Fault Code: PID 26 FMI 8 Fan Speed
All Engines (2004 Emissions) -
Volvo All Engines (2004 Emissions) Fault Code: SID 21 FMI 2 Cam Speed Sensor
All Engines (2004 Emissions) -
Volvo All Engines (2004 Emissions) Fault Code: PID 158 FMI 4 Battery Voltage
All Engines (2004 Emissions) -
Volvo All Engines (2004 Emissions) Fault Code: PID 108 FMI 2 Ambient Pressure Sensor
All Engines (2004 Emissions) -
Volvo All Engines (2004 Emissions) Fault Code: SID 146 FMI 3 EGR Control Valve
All Engines (2004 Emissions) -
Volvo All Engines (2004 Emissions) Fault Code: PID 412 FMI 3 EGR Temperature After Cooler
All Engines (2004 Emissions) -
Volvo All Engines (2004 Emissions) Fault Code: PID 102 FMI 5 Boost Air Pressure / Temperature Sensor
All Engines (2004 Emissions)
