DTC C1242/42 IG2 Power Source Circuit: Description
WARNING: This page is about a different car, the 2007 Lexus SC 430. However, it is still accessible from the selected car via links, so may be relevant.
DTC DETECTION CONDITION CHART
DTC No.
DTC Detection Condition
Trouble Area
C1242/42
With vehicle running, open in IG2 is detected for more than 7 sec.