I am certain I know what is causing this, your symptoms are EXACTLY the same as mine! It was nightmare to deal with and took months to sort out, but that was because no one could tell what the issue is. If you look at this link - https://www.crossfireforum.org/forum...ssue-help.html

This was the topic I posted when I was having the issues, have a look on there and it will tell you everything you need to know! The jist of it, is that its going to be the sensors or abs control module/pump (maybe both like mine)....I would put my house on it being that! Best of luck but this information should enable you to get it sorted, any questions I will do my best to help as know how much of a nightmare if can be!