DTC P1578: Brake System Malfunction [08/2013 - ]: Description
WARNING: This page is about a different car, the 2014 Lexus ES 300h. However, it is still accessible from the selected car via links, so may be relevant.
This DTC is output when the electronically controlled brake system has a problem. Check the electronically controlled brake system when this DTC is output.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| P1578 | The power management control ECU receives a brake system error signal for 0.2 sec. or more while the cruise control is operating |
|