What does this code mean?
The wording below belongs to the named make and communication. Match the complete code, reporting module, model year and engine before applying it.
A code identifies a detected condition, not a part that must automatically be replaced.
Manufacturer wording
Source wording can vary by vehicle and suffix. It is shown as written, not as a universal diagnosis.
P1B77High Voltage Battery Pre-Charging faultManufacturer communications
3Original wording in English
KIA
Reported code forms P1B77
TECHNICAL SERVICE BULLETIN: SERVICE ACTION: BMS/OPU/MCU LOGIC IMPROVEMENT (SA411) - This bulletin has been revised to include additional information. New/revised sections of this bulletin are indicated by a black bar in…
KIA
Reported code forms P1B77
TECHNICAL SERVICE BULLETIN: SERVICE ACTION: BMS/OPU/MCU LOGIC IMPROVEMENT (SA411) - This bulletin provides the procedure to improve the logic of the Battery Management System (BMS), Oil Pump Control Unit (OPU) and Motor…
KIA
Reported code forms P1B77
PITSTOP: DTC P1B25/P1B77 ? 125 AMP HV FUSE INSPECTION - This bulletin has been revised to include additional information. When addressing a concern related to the 2011-2016MY Optima Hybrid (TF HEV) High Voltage (HV)…
Check vehicle applicability
9A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
| Make | Model | Model year |
|---|---|---|
| Kia | OPTIMA HYBRID | 2019 |
| Kia | OPTIMA HYBRID | 2018 |
| Kia | OPTIMA HYBRID | 2017 |
| Kia | OPTIMA HYBRID | 2016 |
| Kia | OPTIMA HYBRID | 2015 |
| Kia | OPTIMA HYBRID | 2014 |
| Kia | OPTIMA HYBRID | 2013 |
| Kia | OPTIMA HYBRID | 2012 |
| Kia | OPTIMA HYBRID | 2011 |
Before replacing a part
Record codes and freeze-frame data. Check battery condition, related codes and visible wiring or hose damage. Follow the vehicle's diagnostic procedure and test results before replacing parts.
Can I keep driving?
A code alone cannot establish whether driving is safe. A flashing malfunction light, severe shaking, overheating, oil-pressure warning or loss of braking or steering needs prompt attention. Stop in a safe place and seek assistance when control or engine safety is affected. Follow the vehicle handbook.