DTC P2278: Oxygen Sensor Signals Swapped - Bank 1, Sensor 3/Bank 2, Sensor 3
WARNING: This page does not describe the selected car, but rather 32 other vehicles, including the 2005 Mercury Sable, 2005 Mercury Mountaineer, 2005 Mercury Monterey, 2005 Mercury Montego, and 2005 Mercury Mariner. However, it is still accessible from the selected car via links, so may be relevant.
P2278 - OXYGEN SENSOR SIGNALS SWAPPED - BANK 1, SENSOR 3/BANK 2, SENSOR 3
| 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: |
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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 |
| All | - | GO to H: Fuel Control STEP H60. | - |