Hi guys, I've a 2007 v8 s5 with 35k on the clock. This week I've noticed a very slight, occasional hesitation at about 2k rpm. Yesterday my CEL came on so plugged it in and got these codes. After a reset the CEL went off but the fault kept coming back. Has anyone come across this before? I was considering getting a hydrogen clean done and am wondering if this would be a reasonable first step to resolve the issue....
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