Volvo All Engines (2013 Emissions) Fault Code: P204F93 PID: EMS SCR System Performance Dosing Failure
Volvo All Engines (2013 Emissions) Fault Code: P204F93 PID: EMS SCR System Performance Dosing Failure
Circuit description
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. Only certain mechanical failure or blockage in the DEF dosing valve or DEF supply line from the DEF tank will result with this fault, it is not a indication of an electrical fault.
Conditions for diagnostic trouble code (DTC)
Clogged or damaged component
Observable symptoms
No aftertreatment diesel exhaust fluid (DEF) dosage
Engine de-rated
Probable cause
1) Aftertreatment diesel exhaust fluid (DEF) dosage valve
![International Truck ISIS - Oncommand Service Information Q4.2020 [04.2020]](https://www.ecuforcetruck.com/wp-content/uploads/2022/01/OnCommand-2020-1-300x300.png)
Related products
-
Volvo All Engines (2004 Emissions) Fault Code: PID 108 FMI 4 Ambient Pressure Sensor
All Engines (2004 Emissions) -
Volvo All Engines (2004 Emissions) Fault Code: PID 102 FMI 5 Boost Air Pressure / Temperature Sensor
All Engines (2004 Emissions) -
Volvo All Engines (2004 Emissions) Fault Code: PID 50 FMI 9 AC System Status
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 171 FMI 9 Ambient Air Temperature Status
All Engines (2004 Emissions) -
Volvo All Engines (2004 Emissions) Fault Code: PID 105 FMI 4 Boost Air Pressure / Temperature Sensor
All Engines (2004 Emissions) -
Volvo All Engines (2004 Emissions) Fault Code: PID 105 FMI 5 Boost Air Pressure / Temperature Sensor
All Engines (2004 Emissions) -
Volvo All Engines (2004 Emissions) Fault Code: SID 146 FMI 7 EGR Control Valve
All Engines (2004 Emissions) -
Volvo All Engines (2004 Emissions) Fault Code: PID 412 FMI 9 EGR Temperature After Cooler
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: SID 21 FMI 2 Cam Speed Sensor
All Engines (2004 Emissions) -
Volvo All Engines (2004 Emissions) Fault Code: PID 49 FMI 9 ABS Status
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 21 FMI 8 Cam Speed Sensor
All Engines (2004 Emissions) -
Volvo All Engines (2004 Emissions) Fault Code: PID 412 FMI 4 EGR Temperature After Cooler
All Engines (2004 Emissions)
