Powertrain, generic (extended)

P2BE4 Hybrid/EV Battery Pack Current Sensor C Circuit

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

P2BE4 is the general circuit code for a third current measurement in the high-voltage battery, used where sensor A (P0ABF to P0AC3) and sensor B (P0B0E to P0B13) are already taken. What C measures depends on the design: a further Hall or shunt channel, or a sensor in a second current path; Continental patents a battery busbar with three independent current devices whose values are compared. No manufacturer documents P2BE4 publicly. GM's generic check for sensor A shows the method: before precharge the reading is stored as zero, and if it then moves by less than 1 A once loads draw current, the sensor is judged stuck. CARB requires circuit checks for hybrid inputs. Loss of a current value limits power; bus loss of sensor C is U064C.

Likely causes

Current sensor C defective
Wiring or connector fault between sensor and battery controller
Input stage or software of the battery controller

Symptoms

  • Hybrid or EV system warning
  • Reduced electric power or range
  • MIL on

Repair estimate

DifficultyShop_onlyWorkshop job
Parts and labour€150–1,500
Time1–5 h

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

Parts involved

hv battery pack current sensor cwiring harnessbms

Related codes

P2BE5P2BE6P2BE7U064CP0ABFP0B0E

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