P0B3E code meaning
Hybrid/EV Battery Voltage Sense A Circuit High
Powertrain system Generic code P0Bxx codes Check engine light
What P0B3E means
P0B3E sets when cell voltage channel A reads above any value a healthy lithium-ion cell reaches, so the reading is treated as a sensing fault. GM sets it in the battery energy control module when cell voltage A is 4.8 V or more for 1.4 s within a 2 s window, Type A, one trip. FCA uses the code on the 2021 Jeep Wrangler 4xe as Voltage Sense 1 Circuit High and on the 2019 Ram 1500 eTorque as Voltage Sense A Circuit High; in both cases a battery pack control module update removes a false MIL. A truly overcharged cell sets separate cell voltage high codes such as P0DE7 instead. Low, range and open faults are P0B3D, P0B3C and P0B3B. The car limits battery use.
P0B3E at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyWorkshop only
- Typical labor0.2 to 6 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P0B3E
- MIL on, possibly without noticeable drivability change
- Electric drive or start-stop disabled
- Charging limited
Common causes of P0B3E
- Most likelyBattery pack control module software causing a false MIL (FCA)
- PossibleOpen sense line letting the input float high
- Less likelyMeasurement input of the cell monitoring chip failed
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 P0B3E 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. |
| 3E | The exact fault in that area. |
What to do next
- Note P0B3E 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 P0B3E
What does P0B3E mean?
P0B3E means "Hybrid/EV Battery Voltage Sense A Circuit High". P0B3E sets when cell voltage channel A reads above any value a healthy lithium-ion cell reaches, so the reading is treated as a sensing fault. It is a generic code, so it means the same on every make.
Is it safe to drive with P0B3E?
Drive gently and only to a workshop. With P0B3E the car can go into limp mode (reduced power) to protect itself.
Will P0B3E fail an emissions test?
Yes, it can. P0B3E 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 P0B3E to fix?
Difficulty: workshop only. A typical repair takes 0.2 to 6 hours of work. This is a job for a workshop.
Will P0B3E clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.