Code U0121
#1
Code U0121
Very strange, I haven’t had a problem and haven’t done any work in almost 1k miles. My 8 has just over 144k miles with a freshly remanned engine that I installed myself and this code came on randomly while driving. All of the gauges including the rpms dropped and went back to normal but now my cel and came on which was very weird. Any help is appreciated!
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