This bulletin applies to 2015-2016 Porsche Cayenne PHEV vehicles. The MIL may be on, accompanied by DTC P0C4700 present in the high voltage battery. Often this failure mode is not accompanied by other unwanted behavior. A bad ground has been found in a number of cases. The service recommendation is to check ground continuity and replace the electric water pump and the electric water pump relay if necessary.
Information for Technical Service Bulletins comes from ProDemand, Mitchell 1's auto repair information software for domestic and import vehicles. Headquartered in San Diego, Mitchell 1 has provided quality repair information solutions to the automotive industry since 1918.
Mike Mavrigian has written thousands of automotive technical magazine articles involving a variety ofspecialties, from engine building to wheel alignment, and has authored more than a dozen books that crisscross the automotive spectrum. Mike operates Birchwood Automotive, an Ohio shop that builds custom engines and performs vintage vehicle restorations. The shop also features a professional photo studio to document projects and to create images for articles and books.
