Dear sifus, recent I have replaced my E90 camshaft sensor with a new unit but the error still persists. Since the workshop cant figure out what's the problem hence I seek for advise from another specialist. After checking, the mechanic claimed that it is the accentric shaft problem that caused the camshaft sensor not working. He also claim that this error will cause engine losing power.So, my question is, whether what the mechanic said is true? By the way, although the error persist when diagnose but there my E90 is still runnining without any engine error code coming out. Please advise. Thanks.