Join Now
International Automotive Technicians Network

U0121 Diagnostic Trouble Code Discussion for July 2009

Lost Communication With EBCM


Note: This is a professional automotive technician's resource.
Vehicle Owners: If you are seeking an automotive repair professional to service your vehicle, visit the iATN Repair Shop Finder.

Trouble Ticket Help Requests for DTC U0121
Help Request Posted
2005 Jeep Grand Cherokee Limited 5.7L MIL Lamp on VIN: 1J8HR58205
U0121: Lost Communication With Antilock Brake System Module. This Jeep came in for PA reconstructed title paperwork. It has a code for the steering angle sensor. But when I did a wheel alignment, the battery went almost dead. Since then, the ABS, brake, ESP,and engine MIL lights are lit. Also, it flashes on the display ...
July 06, 2009
2005 Jeep Grand Cherokee Limited 5.7L MIL Lamp on VIN: 1J8HR58205
U0121: Lost Communication With Antilock Brake System Module. This Jeep came in for PA reconstructed title paperwork. It has a code for the steering angle sensor. But when I did a wheel alignment, the battery went almost dead. Since then, the ABS, brake, ESP,and engine MIL lights are lit. Also, it flashes on the display ...
July 06, 2009