Working on a 2003 IC DT530 RE. Getting codes 124 and 333 on the scanner. 124 is ICP signal out of range low, and 333 is injection pressure above/below desired specifications. Already changed the IPR valve and do not have the tools to deadhead the HPOP. Should I replace the ICP sensor and see if the codes go away? Where is the ICP sensor located on this engine? Thanks in advance.