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2002 OUTBACK WAGON, BASIC L4 ENGINE, AUTO TRANSITION,DASHBOARD WARNING LIGHT


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disonnect the battery for ten minutes, then connect it have the codes re-read.  Lets make sure these are active codes and not old codes.

P0301

Cylinder 1 Misfire Detected

P0302

Cylinder 2 Misfire Detected

P0303

Cylinder 3 Misfire Detected

P0304

Cylinder 4 Misfire Detected

 

 

420 is an O2 sensor

 

When was the last time this car had a tuneup?

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I would start with the MAP sensor issue + a tuneup and then go from there. It's possible the map sensor is causing it to run rich which is setting off the cat codes, but it does look like you have a possible bad o2 sensor as well.

 

And as fairtax said, how many miles and when was the last timing belt?

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