Ford P0040 OBD-II Trouble Code Definition: P0040 1/1 And 2/1 O2 Sensor Harness Connectors Reversed P0040 Ford OBD-II Trouble CodeDescription: OBD Trouble Code P0040 O2 Sensor Signals Swapped Bank 1 Sensor 1/ Bank 2 Sensor 1 Sorry no other information,Please help us to improve,Any information is appreciated.Thanks. […]