Powertrain, generic · Hybrid propulsion

P0BBE Hybrid/EV Battery Pack Voltage Variation

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

P0BBE watches the gap between the highest and the lowest cell voltage in the pack. GM's first-generation Volt sets it when that difference exceeds 0.3 V in 50 of 245 samples taken every 100 ms, provided the cell voltage rationality fault is not active; it is a one-trip Type A fault. Stellantis lists the code on the Jeep Grand Cherokee 4xe and Wrangler 4xe together with P0B24, P0DAB and a state-of-health code, where updated battery pack control module software is the remedy and an unresolved case can end in a no-start. Chrysler's warranty extension for the 2017 to 2021 Pacifica Hybrid replaces the whole high-voltage pack for this code. Its companion P0BBD reports a spread that has exceeded a set limit.

Likely causes

Cells drifted apart beyond what balancing can correct
Battery pack control module software needing an update
Defective or aged high-voltage battery pack
Faulty cell voltage measurement simulating a spread

Symptoms

  • MIL and hybrid system warning
  • Reduced electric range or propulsion
  • Vehicle may not start

Repair estimate

DifficultyShop_onlyWorkshop job
Parts and labour€100–15,000
Time0.5–8 h

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

Parts involved

hv battery packbms

Related codes

P0BBDP0DABP0A7FP0B23P0B24P0B28

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