DTC U029A-87: Lost Communication with Hybrid/EV Battery Sensor Module Missing Message [11/2023 - ]: Description
WARNING: This page is about a different car, the 2025 Toyota Highlander and 2024 Toyota Highlander. However, it is still accessible from the selected car via links, so may be relevant.
The battery voltage sensor detects the HV battery conditions (voltage, current and temperature) and the battery cooling fan frequency, and sends the detected signals to the hybrid vehicle control ECU via CAN communication. (The hybrid vehicle control ECU does not send signals to the battery voltage sensor.)
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Warning Indicate |
|---|---|---|---|---|---|
| U029A-87 | Lost Communication with Hybrid/EV Battery Sensor Module Missing Message | CAN communication error between the hybrid vehicle control ECU and battery voltage sensor: The hybrid vehicle control ECU cannot receive signals from the battery voltage sensor correctly. (1 trip detection logic) |
|
Comes on | Master Warning: Comes on |