Volvo

Volvo All Engines (2013 Emissions) Fault Code: P20C111 PID: ACM Reductant Heater “C” Control

Conditions for diagnostic trouble code (DTC)
The voltage at pin A137:24 is below normal value

Observable symptoms
Ammonia smell can occur if the aftertreatment diesel exhaust fluid (DEF) warmed too much

Probable cause
1) Short circuit to ground, Control wire (-)
2) Wiring harness
3) Aftertreatment Diesel Exhaust Fluid (DEF) Line Heater 3

Volvo All Engines (2013 Emissions) Fault Code: P20C112 PID: ACM Reductant Heater “C” Control

Circuit description
This diagnostic trouble code (DTC) indicates a malfunction at the diesel exhaust fluid (DEF) line heater 3. The DEF lines and line connections between the DEF tank and DEF pump are electrically heated by the DEF line heater 3. The DEF line heater 3 is normally OFF and is commended ON by the aftertreatment control module (ACM) when the ambient air temperature (AAT) and DEF tank temperature are below calibrated threshold. The ACM controls the DEF heater 3 by supplying battery voltage to the common voltage supply circuit and grounding control wire (-) circuit using pulse width modulated signal.

Conditions for diagnostic trouble code (DTC)
The voltage at pin A137:24 is above normal value

Observable symptoms
Ammonia smell can occur if the aftertreatment diesel exhaust fluid (DEF) warmed too much

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

Volvo All Engines (2013 Emissions) Fault Code: P20C113 PID: ACM Reductant Heater “C” Control

Conditions for diagnostic trouble code (DTC)
Open circuit

Probable cause
1) Open circuit, Control wire
2) Open circuit, Common voltage supply
3) Wiring harness
4) Aftertreatment Diesel Exhaust Fluid (DEF) Line Heater 3

Volvo All Engines (2013 Emissions) Fault Code: P20C300 PID: ACM Aftertreatment Reagent Hose Heater 3 Short Circuit Low

This diagnostic trouble code (DTC) indicates a malfunction at the diesel exhaust fluid (DEF) line heater 3. The DEF lines and line connections between the DEF tank and DEF pump are electrically heated by the DEF line heater 3. The DEF line heater 3 is normally OFF and is commended ON by the aftertreatment control module (ACM) when the ambient air temperature (AAT) and DEF tank temperature are below calibrated threshold. The ACM controls the DEF heater 3 by supplying battery voltage to the common voltage supply circuit and grounding control wire (-) circuit using pulse width modulated signal.

Conditions for diagnostic trouble code (DTC):
1) The voltage at pin A137:24 is below normal value

Observable symptoms
1) Ammonia smell can occur if the aftertreatment diesel exhaust fluid (DEF) warmed too much

Probable cause
1) Short circuit to ground, Control wire (-)
2) Wiring harness
3) Aftertreatment Diesel Exhaust Fluid (DEF) Line Heater 3

Volvo All Engines (2013 Emissions) Fault Code: P20C300 PID: EMS Aftertreatment Reagent Hose Heater 3 Short Circuit Low

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: P20C400 PID: ACM Aftertreatment Reagent Hose Heater 3 Short Circuit High

Conditions for diagnostic trouble code (DTC)
The voltage at pin A137:24 is above normal value

Observable symptoms
Ammonia smell can occur if the aftertreatment diesel exhaust fluid (DEF) warmed too much

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

Volvo All Engines (2013 Emissions) Fault Code: P20CA00 PID: ACM Reductant Injection Air Pressure Leakage

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 duty cycle is higher than expected

Probable cause
1) Leakage from air lines
2) Overflow valve
3) Air Valve
4) Nozzle
5) Air Cleaner (ACL)

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: P20CF7A PID: EMS Exhaust Aftertreatment Fuel Injector “A” Stuck Open

The Aftertreatment Hydrocarbon Dosing Module contains three non serviceable valves, the Aftertreatment Fuel Shutoff Valve, Aftertreatment Purge Air Valve and Aftertreatment Hydrocarbon Dosing Valve, and a serviceable Aftertreatment Fuel Pressure Sensor.
During DPF regeneration the Engine Control Module (ECM) sends a voltage signal to activate the Aftertreatment Fuel Shutoff Valve to the open position. This allows fuel to flow into the Aftertreament Hydrocarbon Dosing Module. The Aftertreatment Fuel Pressure Sensor monitors the fuel pressure value and sends a reference signal to the ECM. The ECM then sends a PWM signal to the Aftertreatment Hydrocarbon Dosing Valve that regulates the amount of fuel delivered to the Aftertreatment Hydrocarbon Doser through the air/fuel line.
During Air Purge operation the Engine Control Module (ECM) sends a voltage signal to activate the Aftertreatment Purge Air Valve open. This allows air pressure to flow into the Aftertreament Hydrocarbon Dosing Module. The ECM then sends a PWM signal to the Aftertreatment Hydrocarbon Dosing Valve that allows purge air pressure to be monitored by a signal from the Aftertreatment Fuel Pressure Sensor to the ECM.

Conditions for diagnostic trouble code (DTC):
1) Aftertreatment Fuel Pressure, not within expected range
2) Fuel leakage

Observable symptoms
1) Regeneration not possible

Probable cause
1) Aftertreatment Hydrocarbon Dosing Module

Volvo All Engines (2013 Emissions) Fault Code: P20D000 PID: EMS Exhaust Aftertreatment Fuel Injector “A” Stuck Closed

The Aftertreatment Hydrocarbon Dosing Module contains three non serviceable valves, the Aftertreatment Fuel Shutoff Valve, Aftertreatment Purge Air Valve and Aftertreatment Hydrocarbon Dosing Valve, and a serviceable Aftertreatment Fuel Pressure Sensor.
During DPF regeneration the Engine Control Module (ECM) sends a voltage signal to activate the Aftertreatment Fuel Shutoff Valve to the open position. This allows fuel to flow into the Aftertreament Hydrocarbon Dosing Module. The Aftertreatment Fuel Pressure Sensor monitors the fuel pressure value and sends a reference signal to the ECM. The ECM then sends a PWM signal to the Aftertreatment Hydrocarbon Dosing Valve that regulates the amount of fuel delivered to the Aftertreatment Hydrocarbon Doser through the air/fuel line.
During Air Purge operation the Engine Control Module (ECM) sends a voltage signal to activate the Aftertreatment Purge Air Valve open. This allows air pressure to flow into the Aftertreament Hydrocarbon Dosing Module. The ECM then sends a PWM signal to the Aftertreatment Hydrocarbon Dosing Valve that allows purge air pressure to be monitored by a signal from the Aftertreatment Fuel Pressure Sensor to the ECM.

Observable symptoms
1) Regeneration not possible

Probable cause
1) Fuel line(s)
2) Obstructed/dirty aftertreatment hydrocarbon doser
3) Aftertreatment Hydrocarbon Dosing Module