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Home >> Jeep >> 2018 >> Grand Cherokee Laredo, RWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 11 (3.0L Diesel - DTCS P24F3-00 To U3017-00) >> DTC Troubleshooting >> U1121-00-Lost Communication With Lin Ecu 1 >> Set Condition

Set Condition

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When the Powertrain Control Module (PCM) detects there is no LIN Bus communication from the Glow Plug Module and/or the Alternator.