P0502 Saturn -

Question

Have the following codes on 2002 Saturn Vue.
P0700 - transmission control
P2176 Throttle control. get 2 codes for this
P0502 Idle air control

Is there a possibility that the ECM is bad and causing these codes. Also in research it was mentioned that a connector could be causing a problem. there was a pdf file attached to the connector issue however I am really leery about opening files when I do not know the source.