Volvo All Engines (2013 Emissions) Fault Code: P208B00 PID: ACM Reductant Pump “A” Control Performance/Stuck Off
Volvo All Engines (2013 Emissions) Fault Code: P208B00 PID: ACM Reductant Pump “A” Control Performance/Stuck Off
Circuit description
The aftertreatment control module (ACM) uses the aftertreatment diesel exhaust fluid (DEF) dosing pressure sensor value to adjust and maintain DEF pressure at the DEF dosing valve by controlling DEF pump speed. If the pressure decreases below expected value when the pump is in initial pressure build-up mode or if the pressure increases above expected value when pump is in idle speed mode, the ACM considers DEF pressure outside of normal operating range and indicates a malfunction in a DEF dosing pressure sensor.
Conditions for diagnostic trouble code (DTC)
Aftertreatment Diesel Exhaust Fluid (DEF) Pump Motor Speed Below normal
Observable symptoms
No aftertreatment diesel exhaust fluid (DEF) dosage
Probable cause
1) Frozen Aftertreatment Diesel Exhaust Fluid (DEF) Pump
2) Restricted Aftertreatment Diesel Exhaust Fluid (DEF) Pump
3) Aftertreatment Diesel Exhaust Fluid (DEF) Pump
Detailed information
Possible engine de-rate
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