DTC P1A81-00: Hybrid/EV Battery Stack 1 Delta SOC High (Extreme); DTC P1A86-00: Hybrid/EV Battery Stack 2 Delta SOC High (Extreme) [11/2022 - ]: Description
WARNING: This page is about a different car, the 2025 Toyota Corolla Cross, 2024 Toyota Corolla Cross, and 2023 Toyota Corolla Cross. However, it is still accessible from the selected car via links, so may be relevant.
The HV battery is composed of 60 cells (3.7 V each) in series. The battery ECU assembly monitors the difference in capacity of each HV battery cell to detect malfunctions of the HV battery.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Warning Indicate | Note |
|---|---|---|---|---|---|---|
| P1A81-00 | Hybrid/EV Battery Stack 1 Delta SOC High (Extreme) | The difference in capacity of each cell of the No. 1 HV supply stack sub-assembly exceeds the specified value excessively. (1 trip detection logic) |
|
Comes on | Master Warning: Comes on |
SAE Code: P1A81 |
| P1A86-00 | Hybrid/EV Battery Stack 2 Delta SOC High (Extreme) | The difference in capacity of each cell of the No. 2 HV supply stack sub-assembly exceeds the specified value excessively. (1 trip detection logic) |
|
Comes on | Master Warning: Comes on |
SAE Code: P1A86 |
HINT:
These DTCs can be stored after clearing the DTCs and driving the vehicle for approximately 10 minutes.