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U0121 Diagnostic Trouble Code Discussion for October 2016

Lost Communication With EBCM


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Trouble Ticket Help Requests for DTC U0121
Help Request Posted
2007 Chevrolet HHR LS 2.2L MIL Lamp on, Radio LOCK VIN: 3GNDA13D57
U0121: Lost communications with Anti-Lock Brake System ABS Control Module Symptom 00. The vehicle was a no start after jump starting the car with the jump posts under the hood. The power door locks were in-op, the IPC was staying active with the key out of the ignition, the radio was staying on even after opening all doors, the DRL's would stay...
October 28, 2016
2015 Dodge Journey SXT 3.6L MIL Lamp on VIN: 3C4PDCBG7F
U0121: ABS comm lost stored in PCM/BCM/IPC/RFH/TPMS. Greetings fellow head-scratchers, hope someone has an idea on my problem. This 2015 Dodge Journey will intermittently light up the mil/abs/traction lights while driving corresponding with loss of brake lights. If shut off, the car won't crank (push button star...
October 31, 2016