Powertrain, generic · Hybrid propulsion

P0B3E Hybrid/EV Battery Voltage Sense A Circuit High

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

P0B3E sets when cell voltage channel A reads above any value a healthy lithium-ion cell reaches, so the reading is treated as a sensing fault. GM sets it in the battery energy control module when cell voltage A is 4.8 V or more for 1.4 s within a 2 s window, Type A, one trip. FCA uses the code on the 2021 Jeep Wrangler 4xe as Voltage Sense 1 Circuit High and on the 2019 Ram 1500 eTorque as Voltage Sense A Circuit High; in both cases a battery pack control module update removes a false MIL. A truly overcharged cell sets separate cell voltage high codes such as P0DE7 instead. Low, range and open faults are P0B3D, P0B3C and P0B3B. The car limits battery use.

Likely causes

Battery pack control module software causing a false MIL (FCA)
Open sense line letting the input float high
Measurement input of the cell monitoring chip failed

Symptoms

  • MIL on, possibly without noticeable drivability change
  • Electric drive or start-stop disabled
  • Charging limited

Repair estimate

DifficultyShop_onlyWorkshop job
Parts and labour€50–5,000
Time0.2–6 h

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

Parts involved

hv battery voltage sense awiring harnessbms

Related codes

P0B3BP0B3CP0B3DP0B43P0ABD

References: gsi.ext.gm.com, static.nhtsa.gov, static.nhtsa.gov, law.cornell.edu.