I had new catalytic converters installed on my 2012 RR Sport and when we left the shop the red light came on indicating restricted power. I took it back to the shop and it is misfiring. It was fine before I took it to the shop for the repair. Wondering if anyone has had any issue like this and maybe any info to assist us finding the issue. I myself think something is wrong with the catalytic converter but that’s my guess.
Thanks