P0B6F code meaning
Hybrid/EV Battery Voltage Sense K Circuit Low
Powertrain system Generic code P0Bxx codes Check engine light
What P0B6F means
GM's BAS Plus mild hybrid, the eAssist system in table 13OBDG05C, gives P0B6F a simple rule: if the cell sense line for channel K measures below 1.4 V in 7 of 10 samples at 200 ms while the 12 V supply is above 8.8 V, the code is stored as Type B, two trips. Since a lithium-ion cell in use never falls that low, the value must come from a short or a failed input. GM's later battery energy control modules work with 0.2 V and a 1.4 s window, Type A, and the 2012 two-mode trucks with nickel-metal hydride blocks 11 and 12, both under 2 V. The driver typically sees a hybrid warning and loses electric assist; the engine takes over more of the work.
P0B6F 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 P0B6F
- Hybrid warning and MIL after the second trip
- Auto stop and electric assist disabled
Common causes of P0B6F
- Most likelyChannel K sense line shorted to ground or a lower tap
- PossibleFailed measuring input in the battery interface module
- Less likelyBlown protective element in the sense line
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 kWiring harnessBms
What each part of P0B6F 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. |
| 6F | The exact fault in that area. |
What to do next
- Note P0B6F 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 P0B6F
What does P0B6F mean?
P0B6F means "Hybrid/EV Battery Voltage Sense K Circuit Low". GM's BAS Plus mild hybrid, the eAssist system in table 13OBDG05C, gives P0B6F a simple rule: if the cell sense line for channel K measures below 1.4 V in 7 of 10 samples at 200 ms while the 12 V supply is above 8.8 V, the code is stored as Type B, two trips. It is a generic code, so it means the same on every make.
Is it safe to drive with P0B6F?
Drive gently and only to a workshop. With P0B6F the car can go into limp mode (reduced power) to protect itself.
Will P0B6F fail an emissions test?
Yes, it can. P0B6F 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 P0B6F to fix?
Difficulty: workshop only. A typical repair takes 1 to 8 hours of work. This is a job for a workshop.
Will P0B6F clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.