[rbaer]

Does anyone know if you can damage an ECM by clearing diagnostic codes while the car is running? I was using a generic scanner to read out trouble codes and immediately after clearing codes, the car sputtered, and now it accelerates very poorly at anything other than a slight throttle increase.

This is a 1999 boxster 1999 2.5. The codes were for both precat O2 sensors being out of range. When I first saw the codes a few days earlier, I decided to first replace the spark plugs. That went well and the car ran beautifully for a few days until I cleared the codes.

I've considered trying to swap the ECM on it, but I'm hesitant to buy one because I can't tell if mine is in fact bad. I don't know if there is any additional programming needed or if I could just drop in a used similar ECM and see if that fixes the issue. Any suggestions are appreciated.