P0B67 code meaning
Hybrid/EV Battery Voltage Sense I Circuit Intermittent/Erratic
Powertrain system Generic code P0Bxx codes Check engine light
What P0B67 means
SAE J2012 reserves P0B67 for an unsteady signal on channel I, meaning readings that spike, drop and recover. No manufacturer documents this code publicly, and none of the GM tables that define the other four channel I codes includes an erratic test. The fault picture would sit between an open circuit (P0B63) and a frozen value (P0B64): the line works most of the time but loses contact under vibration, heat or current load. CARB requires battery voltage sensors to be monitored as inputs of the energy storage system, which explains why the code exists at all. For diagnosis, record cell voltage I with a scan tool during a drive and compare its noise with neighbouring channels H and J.
P0B67 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyWorkshop only
- Typical labor1 to 8 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P0B67
- Sporadic warning without a reproducible pattern
- Momentary drop in electric power
Common causes of P0B67
- Most likelySense contact on channel I opening under vibration or heat
- PossibleCorroded terminal in the module connector
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 iWiring harnessBms
What each part of P0B67 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. |
| 67 | The exact fault in that area. |
What to do next
- Note P0B67 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 P0B67
What does P0B67 mean?
P0B67 means "Hybrid/EV Battery Voltage Sense I Circuit Intermittent/Erratic". SAE J2012 reserves P0B67 for an unsteady signal on channel I, meaning readings that spike, drop and recover. It is a generic code, so it means the same on every make.
Is it safe to drive with P0B67?
Drive gently and only to a workshop. With P0B67 the car can go into limp mode (reduced power) to protect itself.
Will P0B67 fail an emissions test?
Yes, it can. P0B67 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 P0B67 to fix?
Difficulty: workshop only. A typical repair takes 1 to 8 hours of work. This is a job for a workshop.
Will P0B67 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.