Saturn Repair Problems? Ask a Mechanic for Answers ASAP
I would say your dealer did find a poor connection at the ECM, now it needs some further attention.
The dealer needs to look at coolant temp data etc with a scan tool before they touch anything under the bonnet.
Could be a poor crimp or loose female terminal (poor contact) at the ECM, or a rub through on the engine harness.
A technician has disturbed the fault, and was momentarily ok, but it has now come back.
Has the fault reoccurred, and have you been back to the dealer?
I hope my advice has been of assistance to you.