I have a 99 Intrigue 3.5L and it has been a

There is a magnet under the cover for the sensor, you need to check it to make sure its not cracked or missing. To test the sensor properly you need a waveform viewer multimeter. Once you determine its doing what its suppose to do then you can move to other areas but since your still throwing the code it sounds like its still got a problem. Could be anything from a bad wire to it or a signal wire to the computer, When all checks out ok then we look at the computer as being the issue. This is why its better to have a shop diag a check engine light. They have all the info and TSB's. It ends up costing less in the long run also.