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International Automotive Technicians Network

U0121 Diagnostic Trouble Code Discussion for July 2023

Lost Communication With EBCM

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Trouble Ticket Help Requests for DTC U0121
Help Request Posted
2014 Jeep Cherokee Latitude 2.4L MIL Lamp on, Shifting VIN: 1C4PJMCB9E
U0121: lost communication with ABS. Tow in, every light on dash and flashing odometer. Sometimes wont shift into gear and then get a service shifter message. Sometimes struggles to start but runs good and is charging when it does. Scanner will lose communication when pulling codes then retur...
July 06, 2023