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U0100 Diagnostic Trouble Code Discussion for November 2019

Lost Communication With ECM


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Trouble Ticket Help Requests for DTC U0100
Help Request Posted
2005 Cadillac SRX 3.6L No Start VIN: 1GYEE63785
U0100: Lost Communication With Engine Control Module. Hello IATN Nation, We have a caddy that has a communication issue. It will not communicate with a scan tool or crank until you jump out the starter relay. After that all modules are awake until you shut the car off and it sits over nite. Power and grounds ...
November 20, 2019
2005 Cadillac SRX 3.6L No Start VIN: 1GYEE63785
U0100: Lost Communication With Engine Control Module. Hello IATN Nation, We have a caddy that has a communication issue. It will not communicate with a scan tool or crank until you jump out the starter relay. After that all modules are awake until you shut the car off and it sits over nite. Power and grounds ...
November 21, 2019