Powertrain, generic · Hybrid propulsion

P0B11 Hybrid/EV Battery Pack Current Sensor B Circuit High

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

P0B11 is set when current sensor B delivers a signal above its valid range. In GM's dual-range design, channel B is the fine channel for small currents: the 2019 battery energy control module table fails it above +24 A (ADC count over 4013) for 1.6 s within a 2 s window, Type A, one trip, and the 2011 Volt table above +23 A for 175 ms within 250 ms, one trip. Toyota maps its internal code P0B0E15, excessively high or open IB1 channel voltage, to P0B11 on the 2020-25 RAV4 Hybrid, with one-trip logic and immediate MIL. An open ground, a signal shorted to the supply or a failed sensor are typical. The low-side code is P0B10, the sensor A equivalent P0AC2.

Likely causes

Open signal or ground wire of sensor B
Signal line shorted to the sensor supply or 12 V
Current sensor or junction block with integrated sensor defective

Symptoms

  • MIL and hybrid system warning on
  • Battery power limited, less electric driving
  • Implausible state-of-charge display

Repair estimate

DifficultyShop_onlyWorkshop job
Parts and labour€100–1,500
Time1–5 h

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

Parts involved

hv battery pack current sensor bwiring harnessbms

Related codes

P0B10P0B0EP0B0FP0B13P0AC2

References: gsi.ext.gm.com, gsi.ext.gm.com, estimateca.mymitchell.com.