Recurrent DTC codes in PSCM 2015 Mustang

Ford Non SYNC 3 Support
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Good morning all,

So my 2015 Mustang is throwing intermittent DTCs in the PSCM concerning communication issues with invalid data recieved from the ABS and/or ECU/PCM. Codes U0401 and U0415.

I can clear the codes but they will eventually come back. One or the other or both will come back. There is no CEL with these codes. I dont know any driving issues. I have ran the self check on the ABS, PSCM, and, PCM which comes up empty.

Any ideas where I should focus my attention?
My thoughts would be maybe the ground for the PSCM or the connectors.

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Wiring at the PSCM, or rack. Look for corrosion inside the connectors themselves. If you haven’t done anything with FORScan it is likely that.

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Also look at the input shaft boot.
If that gets cracked or pulls away it lets water get into the PSCM and corrodes the circuit board.

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FWIW I was able to get to the network connector on the power steering module. It did not look corroded but took a brush and cleaned it as good as I could. Put some dielectric grease in the fitting and plugged and unplugged it several times.

I still get the error but much less frequent. Probably will take it into a mechanic to have it looked at. There is not a lot of room under the car to get a good visual inspection of anything.

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