Volvo All Engines (2010 Emissions) Fault Code: SPN 4354 FMI 5 PID: PSID 103 Aftertreatment Diesel Exhaust Fluid (DEF) Line Heater 1
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):
1) Open circuit
Probable cause
1) Wiring harness
2) Aftertreatment Diesel Exhaust Fluid (DEF) Line Heater 1
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