hmm...what about that red connector right above it? maybe it connected into that connector down below it to? the one where it has the "ghetto" hook up?? i do NOT like how those wires are bare like that...wires are insulated for a reason...to me it looks almost as if he took out that red connector and ran new wires...then replaced the connector...one reason the car isn't runnin so good is that the wires are bare...at the very least put black electrical tape over those bare wires...they are seperate for a reason...
and you can still hook up the scan tool to ur car to check what is wrong...it doesn't matter if the check engine light is on or not...