OBD Guide
ENFRDEESPT

P05F0

Reductant Pump Supply Voltage Circuit High

P05F0 is an OBD-II diagnostic trouble code meaning: Reductant Pump Supply Voltage Circuit High. Common causes: welded adblue pump power relay contacts, short circuit of the supply wire for high voltage. Estimated repair cost: $22–167.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$22–167 (est.)

Symptoms

  • Check Engine Light and/or AdBlue Warning Light Is On
  • AdBlue pump does not work normally (excessive noise)
  • Excessive consumption of AdBlue reagent
  • Possible pump overheating
  • Other SCR/AdBlue system codes

Causes

  • Welded AdBlue pump power relay contacts
  • Short circuit of the supply wire for high voltage
  • Generator voltage regulator malfunction
  • AdBlue ECU malfunction
  • Incorrectly installed power relay (voltage mismatch)

How to Fix

  1. Read codes, check on-board voltage (normal: up to 14.5V)
  2. Check the AdBlue pump relay for contact welding (measure the voltage at the pump with the ignition off)
  3. If voltage is present when the ignition is turned off, the relay is faulty
  4. Check the generator: voltage above 15V means the regulator is faulty
  5. Inspect the pump wiring for contact with other circuits.
  6. Replace relay or eliminate high voltage source

Related codes

P05EEP05EFP05F1P05F2P20E8

Error P05F0 by Vehicle Brand

AcuraAudiBAICBMWBYDBuickCadillacChanganCheryChevroletChryslerCitroenDodgeDongfengExeedFAWFordForthingFotonGACGMGMCGeelyGreat WallHavalHondaHongqiHyundaiInfinitiJACJaecooJaguarJeepJetourKaiyiKiaLadaLexusLi AutoLifanLincolnLivanMazdaMercedes-BenzMercuryMitsubishiNIONissanOldsmobileOmodaOpelPeugeotPlymouthPontiacRenaultSWMSaturnSkodaSkywellSubaruSuzukiTankToyotaVolkswagenVolvoVoyahXPengZeekrZotye

FAQ

What does the P05F0 code mean?

P05F0 is an OBD-II diagnostic trouble code that indicates: Reductant Pump Supply Voltage Circuit High

What causes a P05F0 error code?

The most common causes of P05F0 include: Welded AdBlue pump power relay contacts; Short circuit of the supply wire for high voltage; Generator voltage regulator malfunction; AdBlue ECU malfunction.

How do I fix a P05F0 diagnostic trouble code?

To fix P05F0: Read codes, check on-board voltage (normal: up to 14.5V). Check the AdBlue pump relay for contact welding (measure the voltage at the pump with the ignition off). If voltage is present when the ignition is turned off, the relay is faulty. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P05F0?

Limited driving only, diagnose soon

How much does it cost to fix P05F0?

The estimated repair cost for P05F0 is $22–167. Actual cost depends on your vehicle, location, and labor rates.

FRDEESPT

See also: Russian version · NationStat