I have a P0038 that does not go away at all. I have replaced the oxygen sensor and even got the converters replaced and the check engine light goes away for maybe a second before it turns back on. I just bought the car maybe a month and a half ago and the old owner told me the cats got stolen and the check engine light came on after the new cats got installed. I have also replaced the battery since it was reading around 11.3v but it’s now at 12.4v. Any ideas on what I can try out? Thanks in advance.