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The car has 140,000 miles. Just checked the coils by pulling the connector off and got a consistent blue spark on both. Also checked the plugs and none of them seemed fouled. Would a bad pre-cat cause the misfire issue? Also, we have run the car quite a bit with the flashing CEL so I'm guessing...

I'm having similar issues with these two codes. I have a 2002 P5 and I've already changed the plugs and wires (4months ago), cleaned the MAF, checked the EGR valve (dirty but still moving freely), cleaned the fuel filter sock, and replaced the O2 sensors. My next step is to replace the coils but...