My engine failed while driving. Towed to Ford dealership, found out about recall 23S27. Symptoms were the EXACT same but ford is refusing to cover warranty repairs because they said it did not throw the proper code. However ford has offered to cover half of the engine replacement, leaving me with a $4000 bill. Do I have any options? Is there a system of checks and balances that assures that ford is doing everything correctly on their end?