Hi, I had an issue with my parking sensors, I originally had a warning sound and the orange light flashing, borrowed a reader, said o/s right front faulty , so purchased an aftermarket sensor, and replaced, now I just get flashing light, no noise. I then put another reader on cleared the faults, then tried again , still just light, error now saying faulty control unit , does anyone know where is is placed as I can’t find it anywhere on line,

Thanks