When starting from cold, the engine runs in closed loop, which is basically a default ecu setting for the purpose of cold starting. Once up to approx 80degs the car then starts running off its sensors. One of your sensors is buggered. The noise you're hearing is probably the release bearing, that's most likely only due to the poor running though, off balance etc. Water temp sensor will apparently throw a number of other codes due to the engine not fueling correctly once up to temp, this in turn will most likely throw a lambda code. Not sure if that helps at all? [emoji106]