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Volvo SPN 5394 FMI 5 Aftertreatment DEF Dosing Valve- Current below normal or open circuit
This Fault Code is activated when a reduced NOx conversion is detected
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. The fault might be indication of electrical failure or blockage in DEF dosing valve or DEF supply line from the DEF tank.
Symptoms and Vehicle Effect
Excessive NOx emissions
Derating engine torque
No aftertreatment diesel exhaust fluid DEF dosage
Cause for Fault code
Open circuit Wiring harness damaged by rubbing with frame mostly its damage just under the ACM on DEF tank
Connector Plug damage inside
Failed DEF Injector
Failed DEF Dosing
Over fueling DEF
Aftertreatment diesel exhaust fluid DEF dosage valve
Dosage electronic control unit the DEF pump
Faults That result leaking or high hydrocarbons in muffler
Wiring Harness Damaged Video Its show for Mack Truck but its same as Volvo
This Fault Code is activated when a reduced NOx conversion is detected
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. The fault might be indication of electrical failure or blockage in DEF dosing valve or DEF supply line from the DEF tank.
Symptoms and Vehicle Effect
Excessive NOx emissions
Derating engine torque
No aftertreatment diesel exhaust fluid DEF dosage
Cause for Fault code
Open circuit Wiring harness damaged by rubbing with frame mostly its damage just under the ACM on DEF tank
Connector Plug damage inside
Failed DEF Injector
Failed DEF Dosing
Over fueling DEF
Aftertreatment diesel exhaust fluid DEF dosage valve
Dosage electronic control unit the DEF pump
Faults That result leaking or high hydrocarbons in muffler
Wiring Harness Damaged Video Its show for Mack Truck but its same as Volvo
Volvo vnl def pump wiring rubbing, preventive maintenance save from derate
this is a short on the go video that i wanted to make for a long time, but didn't have a good example, if it was hard to hear i was trying to explain that wi...
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