Sharing information that might be helpful. At 58k I started to get codes related to turbo problems. In addition to the codes, I also had what I'm going to call something sticking in the turbo. I would clear the codes and it didn't take long for them to return. I continued to have sticking turbo issues that I could "drive thru" and I would be good for a short while. I was late with the 62k EGR/cooler cleaning. I tried it at 82k, but aborted after only cleaning the EGR and replacing the filter. My instructions sent me to a fastener, that I couldn't get off. At 102k and some You Tube help, I cleaned both the EGR and cooler (I missed the crossover pipe). That fastener never needed to be removed! So with 1.5k on the clean EGR and cooler, not one code or sticking of the turbo. Apparently, a dirty EGR and cooler can make the turbo stick. With these results, and the actual ease of EGR and cooler cleaning, I'm probably going to do it again after a few more thousand miles (including the cross over pipe). Just thought I'd share.