Hi I have fault c1A00 -control module as a permanent fault in the abs system ! No faults on dash just off diagnostics any help

It could be a stored code,problem might have been fixed but code not removed at time of fix

Andy. Andy.
21 Ford Ranger
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Could be I cleared faults didn't check if it did clear can check tomorrow ,when applying the hand brake it makes a loud sqwelling noise could it be related ?

That code relates to Terrain Response Switchpack.

The terrain response
switchpack has
indicated a
calibration/parameter
memory failure for
embedded systems.

Cheers
Col

sounds to me like your handbrake control module isn't working! if it makes a loud screech noise im afraid. That fault code is the same one a diagnostics machine gave me when my handbrake wasn't working, but it turned out in my case it was broken wires going to the switch... however your symptoms point towards the module itself with the loud noise.