So I just switched out the egr valve after i did a obdII scan and the p0401 code popped. I cleared it and it popped again but this time with the P1239 which is the air fuel ratio (but i also saw that it'll pop if the vtec solenoid is failing which can be cause by a bad egr valve)

The only thing that is consistent from before the removal and after the install of the egr is that my automatic trans is slipping from 1 to 2 and from 2 to 3...

Anyone have advice on how to resolve issue? much appreciated!