Powertrain, generic · Hybrid propulsion

P0B3C Hybrid/EV Battery Voltage Sense A Circuit Range/Performance

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

P0B3C flags a cell voltage channel A that reads plausible values but does not follow the other cells. GM runs this check in Hybrid Powertrain Control Processor 2 as a stuck-in-range test: while the average cell voltage moves by at least 0.005 V in one direction between samples, channel A must move as well; 35 failures in 40 samples at 100 ms set the code, Type A, one trip. FCA names the code Voltage Sense 1 Circuit Performance on the Chrysler Pacifica plug-in hybrid and fixes it, together with P0B41 and further channels, by reprogramming the battery pack control module. Circuit, low, high and erratic faults have their own codes. The system limits battery power or shuts down hybrid operation.

Likely causes

Battery controller software, fixed by reprogramming (FCA Pacifica)
Cell voltage measurement channel frozen inside the monitoring electronics
High resistance in the cell sense line or its connection
Cell monitoring board failure inside the pack

Symptoms

  • MIL on, often with several voltage sense codes
  • Reduced electric range or no electric drive
  • Contactor related codes stored at the same time

Repair estimate

DifficultyShop_onlyWorkshop job
Parts and labour€50–6,000
Time0.2–8 h

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

Parts involved

hv battery voltage sense awiring harnessbms

Related codes

P0B3BP0B3DP0B3EP0B3FP0B41P0ABB

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