P0B14 code meaning
Hybrid/EV Battery Pack Voltage Sense B Circuit
Powertrain system Generic code P0Bxx codes Check engine light
What P0B14 means
SAE J2012 reserves up to four pack voltage measurements, A to D; voltage sense B is the second one. P0B14 is its general circuit code: the battery controller sees an electrical fault on this input, typically an open or implausible raw signal. Which tap a manufacturer calls B is not standardised. No manufacturer documents P0B14 publicly. For the comparable channel A GM checks pack-side voltage against fixed limits and against the sum of cell voltages (P0ABB to P0ABD). CARB requires battery voltage sensors of hybrid storage systems to be monitored like any input component. Range, low, high and erratic faults have their own codes, P0B15 to P0B18. The system usually limits or blocks high-voltage operation.
P0B14 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyWorkshop only
- Typical labor1 to 6 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P0B14
- MIL and hybrid/EV system warning on
- Battery power limited, reduced electric drive or assist
- Vehicle may not reach Ready or may shut down the high-voltage system
Common causes of P0B14
- Most likelyVoltage sense lead or its fuse open inside the pack
- PossibleSense connector at the battery controller loose or corroded
- PossibleMeasurement input of the battery controller defective
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Hv battery pack voltage sense bWiring harnessBms
What each part of P0B14 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. |
| 14 | The exact fault in that area. |
What to do next
- Note P0B14 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 P0B14
What does P0B14 mean?
P0B14 means "Hybrid/EV Battery Pack Voltage Sense B Circuit". SAE J2012 reserves up to four pack voltage measurements, A to D; voltage sense B is the second one. It is a generic code, so it means the same on every make.
Is it safe to drive with P0B14?
Drive gently and only to a workshop. With P0B14 the car can go into limp mode (reduced power) to protect itself.
Will P0B14 fail an emissions test?
Yes, it can. P0B14 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 P0B14 to fix?
Difficulty: workshop only. A typical repair takes 1 to 6 hours of work. This is a job for a workshop.
Will P0B14 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.