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My engine light went on, so I checked the code in my 16-pin block. It has a button in the #2 position and an LED in the #4 position. Pressing the button I get 3 flashs. I believe that is the fuel injection system. I pressed the button for 10 seconds to clear it, however the engine light is still on.

Two questions:
1) Is that supposed to reset the check engine light?
2) The fuel injection system is pretty general and expensive. Any suggestion is on where to start looking? I have noticed a slight miss on the highway and at idle when the car is warmed up.
 

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Code 3 on the DM is the oxygen sensor. Your next step is to read the HFM codes on pin 8, which will require building the code reader. You should be able to delete the code, hold the button down for about 8 seconds, do this between 3 and 20 seconds of reading the code. Then turn the ignition off for a few seconds.
 
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