hi could any 1 shed some light for me iv got a s2 erst running a full efi conversion cut it running really lean the co is at 0.30 - 0.40 but when i put it on the analyzer and try to adjust it nothing is happening

plugged in the snapon scanner and it came up with code 59 co pot out of limit when the car is running

and code 58 co pot earthed when i just have ignition on anybody know if it just a faulty co pot adjuster