Volvo

Volvo All Engines (2013 Emissions) Fault Code: P20B173 PID: ACM Reductant Heater Coolant Control Valve Control

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Volvo All Engines (2013 Emissions) Fault Code: P20B200 PID: ACM Reductant Heater Coolant Control Valve Control Performance/Stuck Open

Volvo All Engines (2013 Emissions) Fault Code: P20B200 PID: ACM Reductant Heater Coolant Control Valve Control Performance/Stuck Open

Circuit description
This diagnostic trouble code (DTC) indicates malfunction in the aftertreatment diesel exhaust fluid (DEF) tank heater valve or related wiring. The function of the aftertreatment DEF tank heater valve is to allow engine coolant flow to the aftertreatment DEF tank heater element which keeps the DEF from freezing. Frozen DEF may result in no DEF dosing which causes limited vehicle operation.

Conditions for diagnostic trouble code (DTC)
DEF in tank temperature too high

Probable cause
1) Aftertreatment Diesel Exhaust Fluid (DEF) Tank Heater Valve

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Volvo All Engines (2013 Emissions) Fault Code: P20B297 PID: ACM Reductant Heater Coolant Control Valve Control Performance/Stuck Open

Volvo All Engines (2013 Emissions) Fault Code: P20B297 PID: ACM Reductant Heater Coolant Control Valve Control Performance/Stuck Open

Circuit description
This diagnostic trouble code (DTC) indicates malfunction in the aftertreatment diesel exhaust fluid (DEF) tank heater valve or related wiring. The function of the aftertreatment DEF tank heater valve is to allow engine coolant flow to the aftertreatment DEF tank heater element which keeps the DEF from freezing. Frozen DEF may result in no DEF dosing which causes limited vehicle operation.

Conditions for diagnostic trouble code (DTC)
Aftertreatment diesel exhaust fluid (DEF) temperature too low

Observable symptoms
Possible engine de-rate

Probable cause
1) DEF Tank Heating Valve installed backwards
2) Mechanical fault
3) Damaged or restricted actuator coolant lines
4) Aftertreatment diesel exhaust fluid (DEF) tank heater valve

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Volvo All Engines (2013 Emissions) Fault Code: P20B300 PID: ACM Reductant Heater Coolant Control Valve Circuit Low

Volvo All Engines (2013 Emissions) Fault Code: P20B300 PID: ACM Reductant Heater Coolant Control Valve Circuit Low

Circuit description
This diagnostic trouble code (DTC) indicates malfunction in the aftertreatment diesel exhaust fluid (DEF) tank heater valve or related wiring. The function of the aftertreatment DEF tank heater valve is to allow engine coolant flow to the aftertreatment DEF tank heater element which keeps the DEF from freezing. Frozen DEF may result in no DEF dosing which causes limited vehicle operation.

Conditions for diagnostic trouble code (DTC)
The voltage at pin A137.A:4 is below normal value

Observable symptoms
Aftertreatment diesel exhaust fluid (DEF) temperature too low
Possible engine de-rate

Probable cause
1) Short circuit to ground, Control wire (-)
2) Short circuit to ground, Common voltage supply
3) Wiring harness
4) Aftertreatment diesel exhaust fluid (DEF) tank heater valve
5) Aftertreatment Control Module (ACM)

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Volvo All Engines (2013 Emissions) Fault Code: P20B300 PID: EMS Reductant Heater Coolant Control Valve Circuit Low

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Volvo All Engines (2013 Emissions) Fault Code: P20B400 PID: ACM Reductant Heater Coolant Control Valve Circuit High

Volvo All Engines (2013 Emissions) Fault Code: P20B400 PID: ACM Reductant Heater Coolant Control Valve Circuit High

Circuit description
This diagnostic trouble code (DTC) indicates malfunction in the aftertreatment diesel exhaust fluid (DEF) tank heater valve or related wiring. The function of the aftertreatment DEF tank heater valve is to allow engine coolant flow to the aftertreatment DEF tank heater element which keeps the DEF from freezing. Frozen DEF may result in no DEF dosing which causes limited vehicle operation.

Conditions for diagnostic trouble code (DTC)
Short circuit to battery voltage

Probable cause
1) Connector
2) Wiring harness
3) Aftertreatment diesel exhaust fluid (DEF) tank heater valve
4) Dosage electronic control unit (ECU), pump unit

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Volvo All Engines (2013 Emissions) Fault Code: P20B900 PID: ACM Reductant Heater “A” Control

Volvo All Engines (2013 Emissions) Fault Code: P20B900 PID: ACM Reductant Heater “A” Control

Circuit description
This diagnostic trouble code (DTC) indicates a malfunction at the diesel exhaust fluid (DEF) line heater 1. The DEF line and line connection between the DEF tank and DEF dosing valve is electrically heated by the DEF line heater 1. The DEF line heater 1 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 1 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)
Open circuit

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

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Volvo All Engines (2013 Emissions) Fault Code: P20B911 PID: ACM Reductant Heater “A” Control

Volvo All Engines (2013 Emissions) Fault Code: P20B911 PID: ACM Reductant Heater “A” Control

Circuit description
This diagnostic trouble code (DTC) indicates a malfunction at the diesel exhaust fluid (DEF) line heater 1. The DEF line and line connection between the DEF tank and DEF dosing valve is electrically heated by the DEF line heater 1. The DEF line heater 1 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 1 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 A137:28 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 1

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Volvo All Engines (2013 Emissions) Fault Code: P20B912 PID: ACM Reductant Heater “A” Control

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