DISA simulator
 

Once I installed the DASC on my car I wanted to remove the DISA and clean up the engine bay as much as possible. However doing so would have triggered the CEL.
NickG software upgrade turns off the CEL when the DISA is removed. However the ECU still record an error code.

This solution (I put about 1K miles on it since I installed it) removes the DISA and keeps the ECU free of any error code.

You can find the DIY here:
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Or here as a single page.