Had Codes 83,84,85, for which the fix was to replace old 60220 ECM with newer model 60221 ECM. Runs great as always, but threw new code. Checked code, get 83, 84, 85. Wait, that's where I started, %$#%^#@. Codes are stored in the ECM, so if the new ECM throws the old code, what do I do? Is it possible I actually had a "TCM Communication" problem and wasted money on a new ECM? I Searched in vain for this answer so any help would be great.