It seems no one can escape the troublesome CP4 issues on more modern diesels. However, there are a few ways to improve and increase the life of the CP4 pump and your entire fuel system – run fuel additives and give your system more lubricity. We discuss more details in this episode of AMSOIL Garage.
To shop/purchase fuel additives: https://www.amsoil.com/c/diesel-additives/18/