OBD Guide
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P0B08

Electric/Auxiliary Transmission Fluid Pump Motor Phase W Current High

P0B08 is an OBD-II diagnostic trouble code meaning: Electric/Auxiliary Transmission Fluid Pump Motor Phase W Current High. Common causes: mechanical jamming of the transmission fluid pump, problems in the electrical circuit of the pump motor (short circuit, open circuit). Estimated repair cost: $56–167.

Severity
🔴 High
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$56–167 (est.)

Symptoms

  • Transmission warning light on dashboard
  • Reduced transmission efficiency
  • Noise or vibration from the transmission fluid pump
  • Transmission overheating
  • Transmission transition to emergency mode

Causes

  • Mechanical jamming of the transmission fluid pump
  • Problems in the electrical circuit of the pump motor (short circuit, open circuit)
  • Pump motor malfunction
  • Transmission control module (TCM) problems
  • Contaminated or low transmission fluid level

How to Fix

  1. Check the level and condition of the transmission fluid
  2. Diagnose the electrical circuit of the pump motor for breaks or short circuits
  3. Check the resistance of the pump motor windings
  4. If necessary, replace the transmission fluid pump motor
  5. Reflash or replace the transmission control unit if necessary

Related codes

P0B09P0B07P0B0A

Error P0B08 by Vehicle Brand

AcuraAudiBAICBMWBYDBuickCadillacChanganCheryChevroletChryslerCitroenDodgeDongfengExeedFAWFordForthingFotonGACGMGMCGeelyGreat WallHavalHondaHongqiHyundaiInfinitiJACJaecooJaguarJeepJetourKaiyiKiaLadaLexusLi AutoLifanLincolnLivanMazdaMercedes-BenzMercuryMitsubishiNIONissanOldsmobileOmodaOpelPeugeotPlymouthPontiacRenaultSWMSaturnSkodaSkywellSubaruSuzukiTankToyotaVolkswagenVolvoVoyahXPengZeekrZotye

FAQ

What does the P0B08 code mean?

P0B08 is an OBD-II diagnostic trouble code that indicates: Electric/Auxiliary Transmission Fluid Pump Motor Phase W Current High

What causes a P0B08 error code?

The most common causes of P0B08 include: Mechanical jamming of the transmission fluid pump; Problems in the electrical circuit of the pump motor (short circuit, open circuit); Pump motor malfunction; Transmission control module (TCM) problems.

How do I fix a P0B08 diagnostic trouble code?

To fix P0B08: Check the level and condition of the transmission fluid. Diagnose the electrical circuit of the pump motor for breaks or short circuits. Check the resistance of the pump motor windings. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P0B08?

Limited driving only, diagnose soon

How much does it cost to fix P0B08?

The estimated repair cost for P0B08 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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