P1129 - Downstream Oxygen Sensors Swapped From Bank To Bank (Ho2S-12-22)
WARNING: This page does not describe the selected car, but rather 30 other vehicles, including the 2004 Mercury Sable, 2004 Mercury Mountaineer, 2004 Mercury Monterey, 2004 Mercury Marauder, and 2004 Mercury Grand Marquis. However, it is still accessible from the selected car via links, so may be relevant.
P1129 - DOWNSTREAM OXYGEN SENSORS SWAPPED FROM BANK TO BANK (HO2S-12-22)
| 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: |
|
||
| Diagnostic Aids: | - | ||
| Application | Key On Engine Off | Key On Engine Running | Continuous Memory |
| Gasoline | - | GO to H: Fuel Control STEP H69 | - |
| Dedicated NGV | GO to HA: Natural Gas Fuel Control STEP HA52 | GO to HA: Natural Gas Fuel Control STEP HA52 | GO to HA: Natural Gas Fuel Control STEP HA52 |