renault clio ii 1.2 misfire only when cold

I need help I have tried to work out what is wrong with my clio for the last year. I worry theres a problem with the ecu.

I get fault codes Renault specific mind. lambda signal weak indicating lean. mixture trim grease limit exceeded. knock sensor signal out of range/implausible.

What happens only when cold it intermittently run on what feels like two cylinders but when I compensate with the throttle it will shoot off like a rocket. I don't think cat is gonna go through emissions this year either. I did have coil pack go on me quite a while before this happened and it seems to eat oil like me at the pub but has only the smallest of leaks, not enough to compensate for how much it uses. before I had it it did stay sitting for a while. when it gets to operating temperature it is fine. head gasket is good as well.