P0B3CHybrid/EV Battery Voltage Sense A Circuit Range/Performance
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- 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.
- What you may notice
- MIL on, often with several voltage sense codes
- Reduced electric range or no electric drive
- Contactor related codes stored at the same time
- Likely causes
- LikelyBattery controller software, fixed by reprogramming (FCA Pacifica)
- PossibleCell voltage measurement channel frozen inside the monitoring electronics
- PossibleHigh resistance in the cell sense line or its connection
- RareCell monitoring board failure inside the pack
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Workshop only · Usually a job for a workshop.Typical cost: €50 – €6,000
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.