Mercury Repair Questions? Ask a Mechanic for Answers ASAP
Often when using a non Ford diagnostic tool you can get false U module communication codes, so lets address the 1155 code first. If the diag steps from Ford are needed, let me know. Use your tool and monitor the speed sensors on a bar graph while driving and swerving to see if the LF ever reads a drastic difference. If so then its the wheel speed sensor or the tone ring the sensor reads from. If it drops completely out then OHM test the sensor to ABS module wiring for a break or resistance.
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It seems like we are not done yet. If your still wanting/needing help, I m still available.