Powertrain, generic · Hybrid propulsion

P0B13 Hybrid/EV Battery Pack Current Sensor A/B Correlation

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

P0B13 compares the two pack current readings, sensor A and sensor B, and sets when they disagree. On the Chevrolet Volt GM pairs a coarse and a fine channel: the code fails when they differ by more than 10 A while both read between -20 and 20 A, for example 10 s within a 12.5 s window (2016) or 400 of 500 samples at 25 ms (2019), Type A, one trip. Bulletins show P0B13 on the GM Lyriq, Hummer EV and BrightDrop Zevo after suspect public chargers, and on the Audi Q5 PHEV and e-tron GT, where software of the battery controller caused it. Single-sensor faults use P0ABF to P0AC3 and P0B0E to P0B12. The driver sees a high-voltage warning and reduced power.

Likely causes

Battery controller software fault, fixed by update (Audi, GM)
Disturbance from an external charging station during charging
Offset drift of one of the two current channels
Internal communication fault between switching unit and current sensor

Symptoms

  • MIL and hybrid/EV system warning on
  • Red battery or Service High Voltage message, request to stop safely
  • Battery power limited, reduced electric drive or assist
  • Charging interrupted or refused

Repair estimate

DifficultyShop_onlyWorkshop job
Parts and labour€80–2,000
Time0.5–5 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

hv battery pack current sensor ahv battery pack current sensor bbms

Related codes

P0ABFP0AC0P0B0EP0B0FP0AC1P0B10

References: gsi.ext.gm.com, static.nhtsa.gov, static.nhtsa.gov, static.nhtsa.gov.