P0B92 code meaning
Hybrid/EV Battery Voltage Sense R Circuit Low
Powertrain system Generic code P0Bxx codes Check engine light
What P0B92 means
P0B92 stands for an implausibly low reading on sense R. In GM's lithium-ion battery controllers of 2016 and 2019 the limit is 0.2 V or less for 1.4 s inside a 2 s window, Type A; the test is suspended while an open sense line fault is active, so a broken lead appears as P0B90 rather than P0B92. Programmes with a separate battery sensor module (GM 16OBDG02) use under 0.20 V in 14 of 18 samples. The eAssist mild hybrid applies 1.4 V, 7 of 10 samples, Type B. In the 2012 two-mode trucks R is NiMH block 18, and blocks 18 and 19 must both read under 2 V in 15 of 20 samples (Type B). A short of the sense lead to ground or to a lower cell is the classic cause.
P0B92 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 P0B92
- MIL and hybrid or EV system message
- Propulsion limited, possibly no restart
Common causes of P0B92
- Most likelySense lead R chafed through and touching ground or a lower cell
- PossibleFailed input for channel R on the cell monitoring board
- Less likelyCell or block on channel R genuinely collapsed
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 rWiring harnessBms
What each part of P0B92 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. |
| 92 | The exact fault in that area. |
What to do next
- Note P0B92 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 P0B92
What does P0B92 mean?
P0B92 means "Hybrid/EV Battery Voltage Sense R Circuit Low". P0B92 stands for an implausibly low reading on sense R. It is a generic code, so it means the same on every make.
Is it safe to drive with P0B92?
Drive gently and only to a workshop. With P0B92 the car can go into limp mode (reduced power) to protect itself.
Will P0B92 fail an emissions test?
Yes, it can. P0B92 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 P0B92 to fix?
Difficulty: workshop only. A typical repair takes 1 to 8 hours of work. This is a job for a workshop.
Will P0B92 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.