I agree you have a valid argument. The substandard tech that worked on your vehicle prob. tried to remove the harness to clean the mud out and broke your pin connector. Then covered his ***** saying the check engine light was on and it was do to contamination from mud, this happens all the time and is by no means right. It's common practice for the dealership techs to also claim phantom engine lights and such because they can claim more time under warranty for the "diagnosis" and "repair". Ford and other manufacturers frown upon this but are virtually powerless to do anything about it short of sending someone to recover the actual info that was in the PCM. This bad practice problem will be fixed because all the manufacturers within 3 years will be running a Black Box program in their PCM's. Just curious, but this isn't the main bulkhead connector that goes into the transmission that was damaged or just the OSS sensor ? If so there's a TSB for faulty o-rings causing fluid leakage and contamination intrusion around the bulkhead connector. Here it is :
6R80 TRANSMISSION BULKHEAD CONNECTOR
SLEEVE LEAKING TRANSMISSION FLUID
2009-2010 Expedition, Explorer Sport Trac,
Some 2009-2010 F-150, Expedition, Explorer Sport Trac, Explorer, Mountaineer and Navigator vehicles equipped with a 6R80 transmission may show signs of transmission fluid leakage around the transmission bulkhead connector sleeve.
Follow the Service Procedure steps to correct the condition.
Verify the leak is present at the transmission bulkhead connector sleeve. With the vehicle in neutral, position it on a hoist. For additional information, refer to Workshop Manual (WSM), Section 100-02.
1.Disconnect the transmission vehicle harness connector by twisting the outer shell and pulling back on the connector.
2.Remove the transmission fluid pan and allow the transmission fluid to drain.
3.Pull the release tab and pull down on the transmission bulkhead electrical connector retainer.
4.With the release tab down, pull the connector sleeve out of the case/mechatronic assembly.
5.Lube new connector sleeve 0-rings with clean transmission fluid, then install connector sleeve into case/mechantronic assembly.
6.Press up on the tab and lock the outer shell of the transmission bulkhead electrical connector sleeve in place. Make sure that the locking tab is securely locked.
7.Install the transmission fluid pan/gasket and refill transmission fluid refer to WSM, Section 307-01 for refill procedure.
DO NOT TOUCH THE ELECTRICAL CONNECTOR PINS OR THE EXPOSED SOLENOID
TABS ON THE TRANSMISSION BULKHEAD ELECTRICAL CONNECTOR. ELECTROSTATIC DISCHARGE MAY OCCUR AND MAY CAUSE DAMAGE TO THE TRANSMISSION CONTROL MODULE (TCM).
BULKHEAD CONNECTOR SLEEVES MAY COME WITH RED OR BLACK 0-RING SEALS. USE ONLY BULKHEAD CONNECTOR SLEEVE THAT HAS BLACK 0-RING SEAL FOR THIS PROCEDURE.