Volvo

This DTC indicates that the amount of consumed DEF calculated by the ECM does not correspond to the level change in the DEF tank.

Conditions for diagnostic trouble code (DTC):
1) Aftertreatment diesel exhaust fluid (DEF) is used and the level change does not correspond to the consumption

Observable symptoms
1) Too high consumption

Probable cause
1) Hose
2) Wrong tank
3) Aftertreatment diesel exhaust fluid (DEF) dosage valve

This DTC indicates that the amount of consumed DEF calculated by the ECM does not correspond to the level change in the DEF tank.

Conditions for diagnostic trouble code (DTC):
1) The voltage at pin A137:51 is more than 5.5?V

Observable symptoms
1) None

Probable cause
1) Wiring harness
2) Connector
3) A137: Aftertreatment Control Module (ACM)

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 Hydrocarbon Doser, Leakage

Observable symptoms
1) Regeneration not possible

Probable cause
1) Aftertreatment Hydrocarbon Doser
2) Fuel line(s), Leakage

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) Voltage above normal or shorted high

Diagnostic operating conditions
1) Output activated
2) Observable symptoms
3) Regeneration not possible

Probable cause
1) Connector
2) Short circuit to battery voltage, Control wire
3) Engine wiring harness
4) Aftertreatment Hydrocarbon Doser
5) Engine control module (ECM)

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) Current below normal or open circuit

Diagnostic operating conditions
1) Ignition key in ON position

Observable symptoms
1) Regeneration not possible

Probable cause
1) Connector
2) Open circuit, Control wire
3) Engine wiring harness
4) Aftertreatment Hydrocarbon Doser
5) Engine control module (ECM)

The following components are connected to a common 12?V supply
R31: Aftertreatment Diesel Exhaust Fluid (DEF) Line Heater 1
R29: Aftertreatment Diesel Exhaust Fluid (DEF) Line Heater 3
A138: Aftertreatment Diesel Exhaust Fluid (DEF) Return Valve
A138: Aftertreatment Diesel Exhaust Fluid (DEF) Pump Motor
Y81: Aftertreatment Diesel Exhaust Fluid (DEF) Tank Heater Valve
If an abnormal voltage or current is detected on the common supply a DTC is set

Conditions for diagnostic trouble code (DTC):
1) The voltage at pin A137:44 is above normal value

Observable symptoms
1) None

Probable cause
1) Wiring harness
2) Connector
3) R31: Aftertreatment Diesel Exhaust Fluid (DEF) Line Heater 1
4) R29: Aftertreatment Diesel Exhaust Fluid (DEF) Line Heater 3
5) A138: Aftertreatment Diesel Exhaust Fluid (DEF) Return Valve
6) A138: Aftertreatment Diesel Exhaust Fluid (DEF) Pump Motor
7) Y81: Aftertreatment Diesel Exhaust Fluid (DEF) Tank Heater Valve
8) A137: Aftertreatment Control Module (ACM)

The following components are connected to a common 12?V supply
R31: Aftertreatment Diesel Exhaust Fluid (DEF) Line Heater 1
R29: Aftertreatment Diesel Exhaust Fluid (DEF) Line Heater 3
A138: Aftertreatment Diesel Exhaust Fluid (DEF) Return Valve
A138: Aftertreatment Diesel Exhaust Fluid (DEF) Pump Motor
Y81: Aftertreatment Diesel Exhaust Fluid (DEF) Tank Heater Valve
If an abnormal voltage or current is detected on the common supply a DTC is set

Conditions for diagnostic trouble code (DTC):
1) The current at pin A137:44 is above normal value
2) The voltage at pin A137:44 is below normal value

Observable symptoms
1) Selective catalytic reduction (SCR) system does not function
2) Possible engine de-rate

Probable cause
1) Wiring harness
2) Connector
3) R31: Aftertreatment Diesel Exhaust Fluid (DEF) Line Heater 1
4) R29: Aftertreatment Diesel Exhaust Fluid (DEF) Line Heater 3
5) A138: Aftertreatment Diesel Exhaust Fluid (DEF) Return Valve
6) A138: Aftertreatment Diesel Exhaust Fluid (DEF) Pump Motor
7) Y81: Aftertreatment Diesel Exhaust Fluid (DEF) Tank Heater Valve
8) A137: Aftertreatment Control Module (ACM)

The following components are connected to a common 12?V supply
R31: Aftertreatment Diesel Exhaust Fluid (DEF) Line Heater 1
R29: Aftertreatment Diesel Exhaust Fluid (DEF) Line Heater 3
A138: Aftertreatment Diesel Exhaust Fluid (DEF) Return Valve
A138: Aftertreatment Diesel Exhaust Fluid (DEF) Pump Motor
Y81: Aftertreatment Diesel Exhaust Fluid (DEF) Tank Heater Valve
If an abnormal voltage or current is detected on the common supply a DTC is set

Conditions for diagnostic trouble code (DTC):
1) Open circuit

Observable symptoms
1) Selective catalytic reduction (SCR) system does not function

Probable cause
1) Wiring harness
2) Connector