can anyone help with these codes?

I have these codes does anyone know where i should start looking for the cause of them? there is code 33... high voltage to map sensor..... code 42...ectronic spark timing open circuit or grounded....45 running rich

Year make and model and engine?
On map sensor always check vacumn to it first.
Rich code 45 may be caused by map sensor problem.

Fix map sensor problem and clear codes and see what comes back.
Post back how that goes.