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DTC 01-2 1 ROM Error; DTC 01-22 RAM Error: Description

WARNING: This page is about a different car, the 2006 Toyota Matrix. However, it is still accessible from the selected car via links, so may be relevant.
ROM/RAM ERROR

DTC No. DTC Detection Condition Trouble Area
01-21 A malfunction exists in ROM. Radio receiver
01-22 A malfunction exists in RAM.
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