MechanicDB
Fault Family System: Powertrain (P-Codes) 15 SAE Codes

Reductant Pump Control

Diagnostic & Technical Explanation
Code P201F (Reductant Pump A Stuck On) covers the low-pressure supply pump that draws diesel exhaust fluid from the tank and feeds the dosing module, flagging when the pump's control circuit is open or shorted, when commanded pump output does not match measured pressure (stuck off), or when the pump keeps running with no command present (stuck on). A frozen or crystallized pump inlet screen, a worn pump motor, and a stuck relay in the pump's power feed are the usual physical causes.

These 15 diagnostic trouble codes share one detection mechanism and one repair path, which is why MechanicDB groups them into a single authored fault family rather than repeating the same explanation 15 times.

Codes in this family (15)

CodeDefinitionRepair coverage
P201FReductant Pump A Stuck On4 ranked fixes
P2059Reductant Injection Air Pump Control Circuit/Open4 ranked fixes
P2060Reductant Injection Air Pump Control Circuit Low4 ranked fixes
P2061Reductant Injection Air Pump Control Circuit High4 ranked fixes
P208AReductant Pump A Control Circuit/Open4 ranked fixes
P208BReductant Pump A Control Performance/Stuck Off4 ranked fixes
P208CReductant Pump A Control Circuit Low4 ranked fixes
P208DReductant Pump A Control Circuit High4 ranked fixes
P20FAReductant Pump B Control Circuit/Open4 ranked fixes
P20FBReductant Pump B Control Performance/Stuck Off4 ranked fixes
P20FCReductant Pump B Control Circuit Low4 ranked fixes
P20FDReductant Pump B Control Circuit High4 ranked fixes
P214EReductant Pump A Current Too High4 ranked fixes
P215DReductant Pump B Stuck On4 ranked fixes
P2C11Reductant Pump A Current Too Low4 ranked fixes

What this page does not show

This page publishes the fault mechanism and the code index. The licensed dataset adds, for every one of the 15,886 codes, the full authored repair set (56,729 procedures in total) with the fields deliberately withheld here: