Volvo

Volvo All Engines (2013 Emissions) Fault Code: P208E00 PID: ACM Aftertreatment Reagent Dosing Valve Clogged

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

Volvo All Engines (2013 Emissions) Fault Code: P208E00 PID: ACM Aftertreatment Reagent Dosing Valve Clogged

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):
1) Clogged or damaged component

Observable symptoms
1) aftertreatment diesel exhaust fluid (DEF) dosage
2) Engine de-rated

Probable cause
1) Aftertreatment diesel exhaust fluid (DEF) dosage valve

Volvo All Engines (2013 Emissions) Fault Code: P208E00 PID: EMS Aftertreatment Reagent Dosing Valve Clogged

Conditions for diagnostic trouble code (DTC):
1) Active DTCs in EATS System
2) Other DTCs detected may be the reason for the selected DTC to be set. The recommendation is to fault trace and repair the other DTCs first. Repairing the other detected DTCs may change selected DTC to inactive.

Action
1) Aftertreatment Control Module (ACM)
2) Fault trace active diagnostic trouble codes (DTCs) on above components

Volvo All Engines (2013 Emissions) Fault Code: P209F00 PID: ACM Aftertreatment Reagent Tank Temperature

Circuit description
Aftertreatment Control Module (ACM) monitors DEF tank temperature and uses it to control the Aftertreatment DEF Tank Heater valve to keep the DEF from freezing.
This temperature monitoring is also used to avoid stopped DEF dosing due to high DEF tank temperatures. If the DEF temperature is too high, reverse flow will be activated, if the temperature stays high for a short duration, a DTC is set.

Conditions for diagnostic trouble code (DTC)
Temperature above 70??C (158??F)

Observable symptoms
No aftertreatment diesel exhaust fluid (DEF) dosage

Probable cause
1) Extreme driving conditions (High ambient temperature)
2) DEF Tank too close to hot object
3) DEF Tank heating valve stuck open
4) DEF Tank Heating Valve installed backwards
5) Temperature Sensor, Aftertreatment diesel exhaust fluid (DEF) tank

Volvo All Engines (2013 Emissions) Fault Code: P209F73 PID: EMS Aftertreatment Reagent Tank Temperature

Circuit description
Aftertreatment Control Module (ACM) monitors DEF tank temperature and uses it to control the Aftertreatment DEF Tank Heater valve to keep the DEF from freezing.

This temperature monitoring is also used to avoid stopped DEF dosing due to high DEF tank temperatures. If the DEF temperature is too high, reverse flow will be activated, if the temperature stays high for a short duration, a DTC is set.

Conditions for diagnostic trouble code (DTC)
The temperature in the tank is below normal

Probable cause
1) Temperature Sensor, Aftertreatment diesel exhaust fluid (DEF) tank
2) Wiring harness
3) Aftertreatment diesel exhaust fluid (DEF) tank heater valve
4) DEF Tank Heating Valve installed backwards

Volvo All Engines (2013 Emissions) Fault Code: P20A000 PID: ACM Reductant Purge Control Valve

Circuit description
When ignition key is turned to OFF position the selective catalytic reduction (SCR) system enters afterrun mode. During afterrun, system attempts to drain diesel exhaust fluid (DEF) from the DEF dosing valve, DEF pump and DEF lines. Aftertreatment control module (ACM) activates DEF return valve by grounding the control wire (-). When the return valve is activated, the DEF reverses flow back to the tank, and DEF dosing pressure is expected to drop. If the dosing pressure does not drop or if it increases during afterrun, the return valve is considered to have a mechanical fault.

Conditions for diagnostic trouble code (DTC)
Open circuit

Observable symptoms
Aftertreatment Diesel Exhaust Fluid (DEF) Pump After-run not possible

Probable cause
1) Connector
2) Wiring harness
3) Aftertreatment Diesel Exhaust Fluid (DEF) Pump

Volvo All Engines (2013 Emissions) Fault Code: P20A013 PID: ACM Reductant Purge Control Valve

Circuit description
When ignition key is turned to OFF position the selective catalytic reduction (SCR) system enters afterrun mode. During afterrun, system attempts to drain diesel exhaust fluid (DEF) from the DEF dosing valve, DEF pump and DEF lines. Aftertreatment control module (ACM) activates DEF return valve by grounding the control wire (-). When the return valve is activated, the DEF reverses flow back to the tank, and DEF dosing pressure is expected to drop. If the dosing pressure does not drop or if it increases during afterrun, the return valve is considered to have a mechanical fault.

Conditions for diagnostic trouble code (DTC)
Open circuit

Observable symptoms
Aftertreatment Diesel Exhaust Fluid (DEF) Pump After-run not possible

Probable cause
1) Connector
2) Wiring harness
3) Aftertreatment Diesel Exhaust Fluid (DEF) Pump

Volvo All Engines (2013 Emissions) Fault Code: P20A072 PID: ACM Reductant Purge Control Valve

Circuit description
This function is used to calculate the EGR Mass Flow. The Engine Control Module (ECM) monitors the EGR differential pressure sensor and the EGR temperature sensor after cooler and uses these signals to calculate the EGR Mass Flow data.

Conditions for diagnostic trouble code (DTC)
The air valve must provide approximately 150?kPa (21.8?psi) air pressure
The overflow valve must be closed below 300?kPa (43.5?psi)
The DEF pressure sensor measures air pressure when the overflow valve should be closed

Probable cause
1) Aftertreatment DEF dosing valve
2) Air line
3) Aftertreatment diesel exhaust fluid (DEF) line

Detailed information
To fully verify the repair it may be necessary to activate vehicle functions or perform a test drive

Volvo All Engines (2013 Emissions) Fault Code: P20A073 PID: ACM Reductant Purge Control Valve

Circuit description
This function is used to calculate the EGR Mass Flow. The Engine Control Module (ECM) monitors the EGR differential pressure sensor and the EGR temperature sensor after cooler and uses these signals to calculate the EGR Mass Flow data.

Conditions for diagnostic trouble code (DTC)
The air valve must provide approximately 300?kPa (43.5?psi) air pressure
The non-return valve must be opened above 300?kPa (43.5?psi)
The DEF pressure sensor does not measure air pressure when overflow valve should be opened

Probable cause
1) Air supply
2) Overflow valve

Detailed information
To fully verify the repair it may be necessary to activate vehicle functions or perform a test drive