DTC P0040: Oxygen Sensor Signals Swapped Bank 1 Sensor 1/Bank 2 Sensor 1

WARNING: This page does not describe the selected car, but rather 25 other vehicles, including the 2012 Lincoln Navigator L, 2012 Lincoln Navigator, 2012 Lincoln MKZ, 2012 Lincoln MKX, and 2012 Lincoln MKT. However, it is still accessible from the selected car via links, so may be relevant.

P0040 - OXYGEN SENSOR SIGNALS SWAPPED BANK 1 SENSOR 1/BANK 2 SENSOR 1

Description: The heated oxygen sensor (HO2S) monitor determines if the HO2S signal response for a fuel shift corresponds to the correct engine bank. This DTC sets when there is no response from the HO2S being tested.
Possible Causes: Crossed HO2S harness connectors Crossed HO2S wiring at the harness connectors Crossed HO2S wiring at the PCM connectors
Diagnostic Aids: Connect the HO2S connector to the correct bank.
Application	Key On Engine Off	Key On Engine Running	Continuous Memory
E-Series 6.8L, Escape 2.5L Manual Transmission, Fiesta, Fusion 3.5L, Fusion 2.5L Manual Transmission, MKZ, Transit Connect	GO to PINPOINT TEST DW .
All others	GO to PINPOINT TEST DZ .