Update Mobile diagnostic chappy cam out again yesterday and couldn't clear the pats issue. Looked all through everything and found that the abs module wouldn't communicate with the rest of the system so he reckoned it was the abs module at fault and said to change the abs module. I sourced a replacement like for like, same part number and from same year and model and have just changed it over and guess what ? Still the same, pats light still on and wont go off so still wont crank engine over.