Forward alert malfunction

[73gscoupe]

Got a problem with an error message: "Forward alert malfunction" comes up on startup (and in messages).

Car was fine before a trip to the panelshop to repair the passenger door. No work was done around the front of the car, just the door.

adaptive cruise still works fine, radar sensor is keeping distance / speed ok.

parking sensors work, but i dont think these are linked into the forward alert system anyway

Any ideas on what may be wrong? Dont know if I should be barking at the panel shop or if its just coincidence?