When you turn the key on does the cooling fan go real fast? If it does it is your RCM. It's a lot cheaper than a screem . Do not go to a dealer they can not get a screem since the only company around that repaird them is SOS diagnostics. To get it repaired you must send them your screem module, ecu and I believe one key. Their web sight will give you or your mechanic info including the removal process. I would try the RCM (relay control module) first since it is plug and play.