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U0121 Diagnostic Trouble Code Discussion for October 2020

Lost Communication With EBCM


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Trouble Ticket Help Requests for DTC U0121
Help Request Posted
2009 Chevrolet Malibu LT 3.6L No Crank VIN: 1G1ZJ57709
... engine and MH2 transmission. It has an intermittent no crank. DTC's present: ECM: P0700 TCM: P2535- ign switch on/start position circuit high, U0121- lost comm w/EBCM, U0140- lost comm w/BCM EBCM: U2106- lost comm w/ TCM BCM: U2106- lost com...
October 08, 2020
2009 Chevrolet Malibu LT 3.6L No Crank VIN: 1G1ZJ57709
... has an intermittent no crank. DTC's present: ECM: P0700 TCM: P2535- ign switch on/start position circuit high, U0121- lost comm w/EBCM, U0140- lost comm w/BCM EBCM: U2106- lost comm w/ TCM BCM: U2106- lost com...
October 09, 2020
2012 Dodge Grand Caravan SXT 3.6L No Start VIN: 2C4RDGCG2C
U0121: lost communication with ABS module. This van will not crank/start. The red security light comes on and flashes the entire time the key is on. If you reset the ECU in the WIN module and CGW the light will go out, but it will not crank. Jumping the starter will cause it to crank over but it wi...
October 21, 2020
2012 Dodge Grand Caravan SXT 3.6L No Start VIN: 2C4RDGCG2C
U0121: lost communication with ABS module. This van will not crank/start. The red security light comes on and flashes the entire time the key is on. If you reset the ECU in the WIN module and CGW the light will go out, but it will not crank. Jumping the starter will cause it to crank over but it wi...
October 24, 2020