Powertrain, generic

P0E4B Hybrid/EV Battery Pack Voltage Sense F Circuit Low

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

P0E4B sets when pack voltage measurement F falls below its plausible minimum, which normally points to a sense path shorted to ground, an open sense fuse or a defective input of the battery controller. No manufacturer documents P0E4B publicly. As a reference, the battery energy control module in GM's 2019 hybrid tables sets the channel A code P0ABC when pack-side voltage stays under 24 V for 1.6 s within a 2 s window, Type A, one trip, as long as system voltage is at least 9 V. CARB requires out-of-range checks of battery voltage sensors. P0E4C is the high counterpart, P0E4A the plausibility fault, and the matching low code of channel E is P0E46. Because precharge and contactor checks rely on the reading, the vehicle may not reach ready mode.

Likely causes

Channel F sense lead shorted to ground or pack housing
Open fuse or resistor in the channel F sense path
Failed analog input of the battery controller

Symptoms

  • No ready mode or contactors do not close
  • MIL and high-voltage warning on

Repair estimate

DifficultyShop_onlyWorkshop job
Parts and labour€100–2,500
Time1–6 h

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

Parts involved

hv battery pack voltage sense fwiring harnessbms

Related codes

P0E49P0E4AP0E4CP0E4DP0E46P0ABC

References: gsi.ext.gm.com, law.cornell.edu.