DTC 01-E2 ON / OFF Indication Parameter Error: Description
WARNING: This page is about a different car, the 2007 Lexus ES 350. However, it is still accessible from the selected car via links, so may be relevant.
DTC TROUBLE DETECTION CONDITION CHART
DTC No.
DTC Detection Condition
Trouble Area
01-E2
The signal for ON/OFF control from the master device has a problem.