P0B26 code meaning
Hybrid/EV Battery A Voltage High
Powertrain system Generic code P0Bxx codes Check engine light
What P0B26 means
P0B26 means the voltage of hybrid/EV battery A is above the permitted value. Bentley documents it in the 48 V Dynamic Ride system of the Continental GT and Flying Spur, stored in address 0021 with symptom code 28672; the prescribed repair is replacing the super capacitor. On the Bentayga it appeared with P16C5, traced to a broken solder joint inside the capacitor; on the Bentayga and Flying Spur Hybrid it shows up in the high-voltage battery manager 008C beside P0B25, with MIL and red HV warning. GM monitors the analogous pack overvoltage with P0ABD (above 479 V, Type A). Typical reasons are a failing energy store, an overcharged cell group or a measuring fault. Low and unstable readings are P0B25 and P0B24. Charging and recuperation are limited.
P0B26 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyWorkshop only
- Typical labor1 to 10 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P0B26
- Bentley Dynamic Ride fault warning, roll control inactive
- MIL on
- Hybrid/EV system or high-voltage battery warning on
- Charging or recuperation restricted
Common causes of P0B26
- Most likelyFailing energy store, e.g. Bentley 48 V super capacitor
- PossibleCell group charged too high, balancing not effective
- Less likelyVoltage measurement fault in the controller or sense leads
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Hv battery aBms
What each part of P0B26 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. |
| 26 | The exact fault in that area. |
What to do next
- Note P0B26 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 P0B26
What does P0B26 mean?
P0B26 means "Hybrid/EV Battery A Voltage High". P0B26 means the voltage of hybrid/EV battery A is above the permitted value. It is a generic code, so it means the same on every make.
Is it safe to drive with P0B26?
Drive gently and only to a workshop. With P0B26 the car can go into limp mode (reduced power) to protect itself.
Will P0B26 fail an emissions test?
Yes, it can. P0B26 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 P0B26 to fix?
Difficulty: workshop only. A typical repair takes 1 to 10 hours of work. This is a job for a workshop.
Will P0B26 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.