Ford P1423 OBD-II Trouble Code Definition: P1423 EGI Functionality Test Failed P1423 Ford OBD-II Trouble CodeDescription: OBD Trouble Code P1423 EGI Functionality Test Failed Sorry no other information,Please help us to improve,Any information is appreciated.Thanks. OBD Trouble Code P1423 Intake Air High Pressure Switch Circuit High Voltage Sorry no other information,Please help us to improve,Any information […]