Volvo

This diagnostic trouble code (DTC) indicates faults in the engine turbocharger compressor bypass actuator and solenoid. The function of the bypass actuator is to re-circulate the heated compressed air from the turbocharger back to the intake side which results in higher exhaust temperatures. A faulty engine turbocharger compressor bypass actuator can lead to power loss if valve is open at inappropriate times and no aftertreatment diesel particulate filter (DPF) regeneration if the bypass valve does not open.

Conditions for diagnostic trouble code (DTC):
1) The voltage at pin A14.EB:46 is above normal value, Output activated

Observable symptoms
1) The solenoid valve cannot be activated
2) Regeneration not possible
3) Possible engine de-rate
4) Aftertreatment selective catalytic reduction (SCR) catalyst warming not possible

Probable cause
1) Short circuit to voltage supply, control wire
2) Control wire in engine wiring harness
3) ETCBV, Solenoid valve(s)

Deactivation
1) Aftertreatment Fuel Injection System
2) Particulate trap regeneration

This diagnostic trouble code (DTC) indicates faults in the engine turbocharger compressor bypass actuator and solenoid. The function of the bypass actuator is to re-circulate the heated compressed air from the turbocharger back to the intake side which results in higher exhaust temperatures. A faulty engine turbocharger compressor bypass actuator can lead to power loss if valve is open at inappropriate times and no aftertreatment diesel particulate filter (DPF) regeneration if the bypass valve does not open.

Observable symptoms
1) Valve constantly activated
2) Low Power

Probable cause
1) Short circuit to ground, Control wire
2) ETCBV, Solenoid valve(s)

Deactivation
1) Aftertreatment Fuel Injection System
2) Particulate trap regeneration

This diagnostic trouble code (DTC) indicates faults in the engine turbocharger compressor bypass actuator and solenoid. The function of the bypass actuator is to re-circulate the heated compressed air from the turbocharger back to the intake side which results in higher exhaust temperatures. A faulty engine turbocharger compressor bypass actuator can lead to power loss if valve is open at inappropriate times and no aftertreatment diesel particulate filter (DPF) regeneration if the bypass valve does not open.

Conditions for diagnostic trouble code (DTC):
1) The voltage at pin A14.EB:46 is below normal value

Observable symptoms
1) The solenoid valve cannot be activated
2) Regeneration not possible
3) Aftertreatment selective catalytic reduction (SCR) catalyst warming not possible

Probable cause
1) Fuse
2) Open circuit, Supply wire
3) Open circuit, Control wire
4) ETCBV, Solenoid valve(s)

Deactivation
1) Aftertreatment Fuel Injection System
2) Particulate trap regeneration

This diagnostic trouble code (DTC) indicates faults in the engine turbocharger compressor bypass actuator and solenoid. The function of the bypass actuator is to re-circulate the heated compressed air from the turbocharger back to the intake side which results in higher exhaust temperatures. A faulty engine turbocharger compressor bypass actuator can lead to power loss if valve is open at inappropriate times and no aftertreatment diesel particulate filter (DPF) regeneration if the bypass valve does not open.

Conditions for diagnostic trouble code (DTC):
1) Engine Turbo Compressor Bypass Valve, Stuck in one position

Observable symptoms
1) Regeneration not possible
2) Possible engine de-rate
3) Low Power

Probable cause
1) Low air pressure
2) Charge air system leakage
3) ETCBV Hose
4) ETCBV Sealing ring
5) Engine Turbo Compressor Bypass Valve
6) ETCBV, Solenoid valve(s)
7) Turbocharger

Detailed information
1) Heat mode inhibited

The aftertreatment DPF switch communicates with the Engine Control Module (ECM) using the J1939-1 data link. If communication is interrupted or disturbed, between the aftertreatment DPF switch and the ECM a diagnostic trouble code (DTC) will be set.

Probable cause
1) Fuse, Short circuit
2) Open circuit, Supply wire
3) Open circuit, Ground wire
4) Data link failure
5) Aftertreatment diesel particulate filter (DPF) switch

Fault Condition:
Ash level too high

Symptoms:
1) Yellow check lamp illuminated

Possible Causes:
1) Need service, ash level is too high

The function identifies and indicates malfunction of the aftertreatment diesel particulate filter (DPF) by analyzing the pressure drop over the aftertreatment DPF. This is done by making a check for deviation between sensor value and a model pressure drop. In some extreme cases the engine will derate.

Conditions for diagnostic trouble code (DTC):
1) High differential pressure across the filter (DPF)

Probable cause
1) Aftertreatment DPF Differential Pressure Sensor
2) Aftertreatment Diesel Particulate Filter (DPF)

The function identifies and indicates malfunction of the aftertreatment diesel particulate filter (DPF) by analyzing the pressure drop over the aftertreatment DPF. This is done by making a check for deviation between sensor value and a model pressure drop. In some extreme cases the engine will derate.

Conditions for diagnostic trouble code (DTC):
1) DPF Differential pressure too low

Observable symptoms
1) None

Probable cause
1) DPF Sensor lines connected incorrectly
2) Differential pressure sensor lines plugged or damaged
3) Aftertreatment DPF Differential Pressure Sensor
4) Aftertreatment Diesel Particulate Filter (DPF)
5) Exhaust leakage prior to the aftertreatment diesel particulate filter (DPF) unit

This function indicates that the NOx conversion efficiency is not correct

Conditions for diagnostic trouble code (DTC):
1) Too high NOx emissions
2) Dosing too low

Observable symptoms
1) Engine de-rated

Probable cause
1) Dosing too low
2) Wrong liquid in tank
3) Faulty contact or defective aftertreatment control module (ACM)
4) Aftertreatment diesel exhaust fluid (DEF) dosage valve
5) Restricted filter
6) Aftertreatment Hydrocarbon Doser, over-fueling
7) Aftertreatment selective catalytic reduction (SCR) catalyst

Detailed information
1) This DTC is only activated if the system is in a temporary state from de-rate
2) The vehicle can be driven to a repair facility in normal driving mode (one driving cycle)
3) This mode is also used by the service shop to allow operation of the vehicle to clear the quality inducement fault