DTC P0040: Upstream Oxygen Sensors Swapped from Bank to Bank (HO2S-11-21)

P0040 - UPSTREAM OXYGEN SENSORS SWAPPED FROM BANK TO BANK (HO2S-11-21)

Description:	The heated oxygen sensor (HO2S) monitor determines if the HO2S signal response for a fuel shift corresponds to the correct engine bank. The test fails when a response from the HO2S being tested is not indicated.
Possible Causes:	Crossed HO2S harness connectors (upstream). Crossed HO2S wiring at the harness connectors (upstream). Crossed HO2S wiring at the PCM connectors (upstream)
Diagnostic Aids:	Connect the HO2S connector to the correct bank.
Application	Key On Engine Off	Key On Engine Running	Continuous Memory
All	-	GO to H: Fuel Control STEP H60.	-