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 33 other vehicles, including the 2010 Mercury Mountaineer, 2010 Mercury Milan, 2010 Mercury Mariner, 2010 Mercury Grand Marquis, and 2010 Lincoln Town Car. However, it is still accessible from the selected car via links, so may be relevant.
DTC 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 |
| Escape/Mariner 3.0L, E-Series 4.6L, E-Series 5.4L, Expedition, F-150, Flex, Fusion 3.0L, Milan 3.0L, MKS, MKT, Navigator, Taurus |
- | GO to PINPOINT TEST DZ . | - |
| All others | - | GO to PINPOINT TEST DW . | - |