Check Engine light fast blinking

Sounds a lot like a plugged converter. The blinking means damage is being done to the converter. If. The converter turns out bad, there is likley a 2nd problem that caused it. Need to get the codes read from the computer for starters.

The code (s) will still be in the computer regardless.

Niagara Falls, NY. Home of Love Canal.
Good luck on the car. If I can be of further assistance, just ask!

Was the Sensor replaced just because the code appeared or was it tested?

If it was indeed bad, you may have got a faulty/defective sensor. There may be an air leak into the snorkel or a problem with the connector or wiring.

You need to start a new question. This one is almost ten years old, and was a conversation between two people. It is now listed as having received a reply, so none of the other experts are going to see it or have a chance to reply. That does you a disservice. Also, you have a very different set of symptoms, so knowing what was done here is not going to apply to your car. That can result in wasted time, wasted money, and lots of frustration.

When you post your question, PLEASE list the engine size, mileage, and transmission type so we don't have to guess or waste time asking. Also include what you've already done, and the results, so we don't have to cover that again.