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Jeep
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2013
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Grand Cherokee Laredo, AWD
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Repair and Diagnosis
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Transmission
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Transmission Control Systems
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(Transmission Control Module (TCM) - Electrical Diagnostics)
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DTC Troubleshooting
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U0121-Lost Communication With Anti-Lock Brake Module
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Set Condition
Set Condition
The DTC will set if a valid CAN ID was not received in the required time from the ABS.