DTC P1A80-00: Hybrid/EV Battery Stack 1 Delta SOC High; DTC P1AD0-1B: Hybrid/EV Battery Block Circuit Resistance Above Threshold [10/2022 - ]: Description
WARNING: This page is about a different car, the 2025 Lexus RX 350h, 2024 Lexus RX 350h, and 2023 Lexus RX 350h. However, it is still accessible from the selected car via links, so may be relevant.
The battery voltage sensor and the hybrid vehicle control ECU calculate the SOC (state of charge) of the HV battery through the accumulated amperage in the HV battery. The battery voltage sensor sends the condition of the HV battery to the hybrid vehicle control ECU. Then the hybrid vehicle control ECU calculates the SOC based on the information and controls the charging and discharging of the HV battery based on the driving condition.
Based on the HV battery voltage and current, the battery voltage sensor calculates the resistance and judges if the HV battery has deteriorated.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Warning Indicate | DTC Output from | Priority | Note |
|---|---|---|---|---|---|---|---|---|
| P1A80-00 | Hybrid/EV Battery Stack 1 Delta SOC High | Difference in capacity between each battery block is larger than standard. (2 trip detection logic) |
|
Comes on | Master Warning: Comes on |
Hybrid Control | A | SAE Code: P1A80 |
| P1AD0-1B | Hybrid/EV Battery Block Circuit Resistance Above Threshold | Resistance of an HV battery block exceeds the specified value. (1 trip detection logic) |
|
Comes on | Master Warning: Comes on |
Hybrid Control | A | SAE Code: P1AD0 |
The following items can be helpful when performing repairs:
Data List
- Ready Signal
- Vehicle Speed
- Accelerator Position
- Shift Position
- Engine Speed
- Hybrid Battery Voltage
- Hybrid Battery Current
- BATT Voltage
- Hybrid/EV Battery SOC just after IG-ON
- Hybrid/EV Battery Maximum SOC
- Hybrid/EV Battery Minimum SOC
- Total Distance Traveled
- Distance from DTC Cleared
- Engine Run Time
- Number of Battery Current Sensor Characteristics Determination
Vehicle Control History Data
- Hybrid/EV Battery Voltage Low
HINT:
- This DTC can be stored after clearing DTCs and driving the vehicle for approximately 10 minutes. (As 2 trip detection logic is also used, check for DTCs including pending DTCs.)
- This DTC may not be stored if the vehicle is stopped or being driven at a steady speed.
- When the internal resistance of the HV battery increases, battery block voltage may drop.
- If resistance is abnormal, the voltage of the battery blocks indicated by the DTCs are likely to decrease more than others during acceleration (discharging), and increase more during deceleration (charging).
- In order to ensure HV battery performance, appropriate cooling performance must be maintained. Perform the following items as necessary. If cooling performance has decreased and "Maintenance Required for Traction Battery Cooling Parts See Owner's Manual" is displayed on the multi-information display, make sure to perform the following items:
- Make sure the air intake port is not blocked.
- Make sure there are no gaps between the connecting parts of the ducts.
- Clean the No. 1 HV battery intake filter.
- Clear the DTCs to reset the learning values even if no DTCs are stored.