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3.0i to 3.0si Tune
Hi, I realize this thread is a bit dated, but hoping someone can advise me on how to proceed. I followed the bimmerlabs 3.0i to 3.0si tune...RSA delete followed by the MSV70 3.0i to 3.0si tune. Noticed significant performance improvement, however after about 20 miles the Engine Maintenance Required Soon light pops up. Code reader presents the same 3 error codes noted in previous threads: U0155, P1407, and P1408. Attempted to clear these several times, but they keep coming back. I've been struggling with this issue for at least 2 months and would appreciate any help here. Thanks
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