Home >> Volvo >> 2007 >> S40 Base, 2.4 38, Standard >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Global Positioning System (GPS), Phone Module (PHM), Subwoofer (Sub) Module, Traffic Message Channel (TMC) Module Diagnostic Trouble Codes (544 Body) >> PHM-E001: Control Module Communication Software Error (2009-2012) >> Faulty Communication (2008-2011)