Monitor Description
WARNING: This page is about a different car, the 2024 Lexus TX 550h+. However, it is still accessible from the selected car via links, so may be relevant.
The ECM and HVAC control module send and receive signals via CAN communication.
If a communication error occurs between the ECM and HVAC control module, the ECM illuminates the MIL and stores this DTC.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | DTC Output from | Priority | Note |
|---|---|---|---|---|---|---|---|
| U0164-87 | Lost Communication with HVAC Control Module Missing Message | All of the following conditions are met for 10.6 seconds or more (1 trip detection logic):
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Comes on | Engine | B | SAE Code: U0164 |