DTC P1644-00: ECU Malfunction (Starter Circuit) [11/2021 - 03/2023]: Description
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2025 Lexus NX 350, 2025 Lexus NX 250, 2024 Lexus NX 350, 2024 Lexus NX 250, and 2023 Lexus NX 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 and blinks the stop and start cancel indicator.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | Warning Indicate | Note |
|---|---|---|---|---|---|
| P1644-00 | ECU Malfunction (Starter Circuit) | Both of the following conditions are met for 0.2 seconds or more (1 trip detection logic):
|
|
Blinks | SAE Code: P1644 |