I have had the same error for several days. In addition, I sometimes feel the NOx compliance error. I put the probe from the passenger car, I'm talking about the very end. From that moment, i.e. about half a year, it showed me a compatibility error, and recently 5531. Look for the problem in the converter or in the very tip of the probe? I also have a second car in which I did the same procedure, i.e. I inserted the Golf VII probe and it works flawlessly for the third year, it has already done 200,000. km and flies without any errors. Thank you in advance for your help.