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Home >> Lexus >> 2003 >> LS 430 >> Repair and Diagnosis >> External Pages >> Different car >> Section 120 (Engine Control System Self Diagnostics) >> Diagnostic Tests >> DTC P1600: Engine Control Module Batt Circuit >> Possible Causes
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Possible Causes

WARNING: This page is about a different car, the 2003 Toyota RAV4. However, it is still accessible from the selected car via links, so may be relevant.

DTC is set when open in back-up power source is detected. Possible causes are: