Is co2 laser good for Post Inflammatory Erythema marks?

I have Post Inflammatory Erythema, like red/pinkish marks on my cheeks and temples. I fair skinned so it stands out and I also have some scarring around it as well. I asked my dermatologist which laser treatment would be best to help fade my red/pinkish marks much faster and he said a co2 laser would be best but I don't know if he meant about the scarring and its hard for me to even see the scarring because of the marks. Is that the right laser procedure or is it a different one for PIE marks