DTC P1644-00: ECU Malfunction (Starter Circuit) [10/2022 - ]: Description
WARNING: This page is about a different car, the 2025 Lexus RX 350, 2024 Lexus RX 350, and 2023 Lexus RX 350. However, it is still accessible from the selected car via links, so may be relevant.
If a malfunction is detected in the starter circuit, the engine stop and start ECU stores DTC P1644-00.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Warning Indicate | DTC Output from | Priority | Note |
|---|---|---|---|---|---|---|---|---|
| P1644-00 | ECU Malfunction (Starter Circuit) | Both of the following conditions are met for 0.2 seconds or more (1 trip detection logic):
|
|
Comes on (For Mexico Models: Does not come on) | Does not come on (For Mexico Models: Blinks) | Stop and Start | B | SAE Code: P1644 |