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.
P1AA7-00Hybrid - EV Battery Temperature Sensor 4 Out Of Range HighP1AA700Hybrid/EV Battery Abnormal Performance: Cell Voltage DeviationManufacturer communications
7Original wording in English
HYUNDAI
Reported code forms P1AA700
Certain 2025MY IONIQ 5 (NEA EV) vehicles may experience a charging issue where a voltage difference between battery cells prevents the High Voltage Battery from fully charging. The two DTCs associated with this issue…
HYUNDAI
Reported code forms P1AA7
Certain 19-23MY Kona Electric (OS EV) vehicles may experience a condition of EV warning light ON with DTC P1AA6 to P1AAF found stored. The Battery Management System (BMS) software update will be performed to enhance…
HYUNDAI
Reported code forms P1AA7
Certain 19-23MY Kona Electric (OS EV) vehicles may experience a condition of EV warning light ON with Diagnostic Trouble Code (DTC) P1AA6 to P1AAF found stored. The Battery Management System (BMS) software update will…
HYUNDAI
Reported code forms P1AA7
Certain 19-23MY Kona Electric (OS EV) vehicles may experience a condition of EV warning light ON with Diagnostic Trouble Code (DTC) P1AA6 to P1AAF found stored. The Battery Management System (BMS) software update will…
HYUNDAI
Reported code forms P1AA7
Certain 19-23MY Kona Electric (OS EV) vehicles may experience a condition of EV warning light ON with DTC P1AA6 to P1AAF found stored. The Battery Management System (BMS) software update will be performed to update the…
CHRYSLER
Reported code forms P1AA7-00
Flash: Battery Pack Control Module (BPCM) Diagnostic and System Improvements This bulletin involves reprogramming the BPCM with the latest available software. Customers may experience a Malfunction Indicator Lamp (MIL)…
Check vehicle applicability
8A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
| Make | Model | Model year |
|---|---|---|
| Chrysler | PACIFICA | 2017 |
| Chrysler | PACIFICA PLUG-IN HYBRID | 2017 |
| Hyundai | IONIQ 5 | 2025 |
| Hyundai | KONA ELECTRIC | 2023 |
| Hyundai | KONA ELECTRIC | 2022 |
| Hyundai | KONA ELECTRIC | 2021 |
| Hyundai | KONA ELECTRIC | 2020 |
| Hyundai | KONA ELECTRIC | 2019 |
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.