P0040 - Oxygen Sensor Signals Swapped Bank 1 Sensor 1/Bank 2 Sensor 1
WARNING: This page does not describe the selected car, but rather 32 other vehicles, including the 2008 Mercury Sable, 2008 Mercury Mountaineer, 2008 Mercury Milan, 2008 Mercury Mariner, and 2008 Mercury Grand Marquis. 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. The test fails when there is no response from the HO2S being tested. | |||
| Possible Causes: |
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| Diagnostic Aids: | Connect the HO2S connector to the correct bank. | |||
| Application | Key On Engine Off | Key On Engine Running | Continuous Memory | |
| Sable PZEV, Taurus PZEV, Taurus X PZEV |
- | refer to PINPOINT TEST DZ . | - | |
| All others | - | refer to PINPOINT TEST DW . | - | |