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TuningBot DTC Database · v4.38.5

P05EF Reductant Pump Supply Voltage Circuit Low

Generic (OBD-II) interpretation in the TuningBot DTC database.

P · PowertrainEmissionsOBD2

What P05EF means

P05EF
Reductant Pump Supply Voltage Circuit Low Generic · emissions Data confidence 65%

The control module detected that the signal in the Reductant Pump Supply Voltage circuit stayed below the expected operating range.

Symptoms

  • MIL or SCR/AdBlue warning illuminated
  • Possible start-count-down or torque limitation on some applications

Possible causes

  • Reductant quality or level fault
  • Dosing valve or supply module fault
  • NOx sensor fault
  • Frozen or crystallized reductant lines
  • Wiring or connector fault

Recommended checks

  • Read NOx sensor values and dosing system status
  • Check reductant level and quality data
  • Inspect dosing valve, lines and heater operation
  • Check wiring and connectors of the SCR components
  • Check for OEM technical bulletins and software updates

Related and nearby codes

Related codes
P05EBP05EDP05EE
P05 range
P0500P0501P0502P0503P0504P0505P0506P0507P0508P0509P050AP050BP050CP050DP050EP050FP0510P0511

How to read P05EF

P

Powertrain: engine, transmission and driveline systems.

0

Generic SAE-standard code: same meaning on every make.

5EF

Specific fault index within the subsystem.

Frequently asked questions about P05EF

What does P05EF mean?

Reductant Pump Supply Voltage Circuit Low. The control module detected that the signal in the Reductant Pump Supply Voltage circuit stayed below the expected operating range.

Is P05EF generic or manufacturer-specific?

P05EF is a generic OBD-II code: it has the same meaning on every make and model that follows the SAE standard.

Can TuningBot remove P05EF at file level?

If the fault logic lives in the ECU calibration, yes: our DTC Removal file service disables the specific fault entry. Checksum correction is not included: it is a separate, optional service. Not sure whether your case qualifies? Request a free assessment and our engineers will check your ECU file.

Other file services

Stage 1/2/3 TuningDPF RemovalEGR RemovalAdBlue / SCR RemovalDTC RemovalIMMO OFFSpeed Limiter (Vmax)

Understand the system behind this code: SCR / AdBlue System

ECU tuningDyno-tested results by model and engine See the results →

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