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Fuse 4 under the hood is the KAM circuit power. Verify this fuse is good and has power.
It powers the RED/LIGHT GREEN wire to the PCM at pin 55. Verify this wire at the PCM connector has power and the connector pin has no corrosion.
If not then the wire is broken, if so then the PCm is to blame for storing this code.
For the flashing DRLs is the DRL relay pulsing as well?
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