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DTC 45-47 High Temperature: Description

WARNING: This page is about a different car, the 2008 Lexus IS F. 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
45-47 Sensor detects that DVD unit temperature is high (Over 80°C (176°F)) Radio receiver