P0B83 code meaning
Hybrid/EV Battery Voltage Sense O Circuit Low
Powertrain system Generic code P0Bxx codes Check engine light
What P0B83 means
P0B83 reports that channel O reads implausibly low. It is not the same as an open lead: GM's lithium-ion controllers run this check only while no open sense line fault is present, so a broken wire shows as P0B81 instead. The low limit there is 0.2 V or less for 1.4 s within 2 s, Type A. The BAS Plus mild hybrid sets it below 1.4 V in 7 of 10 samples, Type B. On the 2012 two-mode trucks, where O is NiMH block 15, block 15 and block 16 must both be under 2 V for 15 of 20 samples, Type B, with the 12 V supply between 9 and 18 V. Short circuits in the sense path towards ground or a lower cell are the main suspects; a genuinely dead cell is the exception and usually brings neighbouring codes as well.
P0B83 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 P0B83
- MIL and hybrid warning lamp
- Electric operation switched off
Common causes of P0B83
- Most likelyShort in the O sense path towards ground or a lower cell
- PossibleMonitoring input reading low
- Less likelyDead cell or NiMH block 15
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 oWiring harnessBms
What each part of P0B83 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. |
| 83 | The exact fault in that area. |
What to do next
- Note P0B83 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 P0B83
What does P0B83 mean?
P0B83 means "Hybrid/EV Battery Voltage Sense O Circuit Low". P0B83 reports that channel O reads implausibly low. It is a generic code, so it means the same on every make.
Is it safe to drive with P0B83?
Drive gently and only to a workshop. With P0B83 the car can go into limp mode (reduced power) to protect itself.
Will P0B83 fail an emissions test?
Yes, it can. P0B83 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 P0B83 to fix?
Difficulty: workshop only. A typical repair takes 1 to 8 hours of work. This is a job for a workshop.
Will P0B83 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.