P0B3C code meaning
Hybrid/EV Battery Voltage Sense A Circuit Range/Performance
Powertrain system Generic code P0Bxx codes Check engine light
What P0B3C means
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.
P0B3C at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyWorkshop only
- Typical labor0.2 to 8 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P0B3C
- MIL on, often with several voltage sense codes
- Reduced electric range or no electric drive
- Contactor related codes stored at the same time
Common causes of P0B3C
- Most 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
- Less likelyCell monitoring board failure inside the pack
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Hv battery voltage sense aWiring harnessBms
What each part of P0B3C means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| B | Area: hybrid propulsion. |
| 3C | The exact fault in that area. |
What to do next
- Note P0B3C and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P0B3C
What does P0B3C mean?
P0B3C means "Hybrid/EV Battery Voltage Sense A Circuit Range/Performance". P0B3C flags a cell voltage channel A that reads plausible values but does not follow the other cells. It is a generic code, so it means the same on every make.
Is it safe to drive with P0B3C?
Drive gently and only to a workshop. With P0B3C the car can go into limp mode (reduced power) to protect itself.
Will P0B3C fail an emissions test?
Yes, it can. P0B3C is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P0B3C to fix?
Difficulty: workshop only. A typical repair takes 0.2 to 8 hours of work. This is a job for a workshop.
Will P0B3C clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.