OBD Guide
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P0B44

Hybrid/EV Battery Voltage Sense B Circuit Intermittent/Erratic

P0B44 is an OBD-II diagnostic trouble code meaning: Hybrid/EV Battery Voltage Sense B Circuit Intermittent/Erratic. Common causes: damaged or corroded voltage sensing circuit connectors, open or short circuit in wiring harness. Estimated repair cost: $56–278.

Severity
🔴 High
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$56–278 (est.)

Symptoms

  • Check Engine light comes on
  • Reduced performance of the hybrid system
  • The car may go into emergency mode
  • Unstable battery voltage reading on dashboard
  • Reduced power or strange transmission behavior

Causes

  • Damaged or corroded voltage sensing circuit connectors
  • Open or short circuit in wiring harness
  • Battery voltage sensor fault B
  • Problems with the battery management module
  • Internal problems of the high-voltage battery

How to Fix

  1. Check the condition of the connectors and wiring in the measurement circuit
  2. Test Battery Voltage Sensor B
  3. Check the integrity of the wiring harness
  4. Scan the battery management module for errors
  5. Check the condition of the high-voltage battery
  6. Repair only from an authorized dealer

Related codes

P0B45P0B46P0B47

Error P0B44 by Vehicle Brand

AcuraAudiBAICBMWBYDBuickCadillacChanganCheryChevroletChryslerCitroenDodgeDongfengExeedFAWFordForthingFotonGACGMGMCGeelyGreat WallHavalHondaHongqiHyundaiInfinitiJACJaecooJaguarJeepJetourKaiyiKiaLadaLexusLi AutoLifanLincolnLivanMazdaMercedes-BenzMercuryMitsubishiNIONissanOldsmobileOmodaOpelPeugeotPlymouthPontiacRenaultSWMSaturnSkodaSkywellSubaruSuzukiTankToyotaVolkswagenVolvoVoyahXPengZeekrZotye

FAQ

What does the P0B44 code mean?

P0B44 is an OBD-II diagnostic trouble code that indicates: Hybrid/EV Battery Voltage Sense B Circuit Intermittent/Erratic

What causes a P0B44 error code?

The most common causes of P0B44 include: Damaged or corroded voltage sensing circuit connectors; Open or short circuit in wiring harness; Battery voltage sensor fault B; Problems with the battery management module.

How do I fix a P0B44 diagnostic trouble code?

To fix P0B44: Check the condition of the connectors and wiring in the measurement circuit. Test Battery Voltage Sensor B. Check the integrity of the wiring harness. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P0B44?

Do not drive — repair immediately

How much does it cost to fix P0B44?

The estimated repair cost for P0B44 is $56–278. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat