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Home >> Jeep >> 2021 >> Grand Cherokee L Laredo, RWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 17 (5.7L - DTCS P0456 To P0629) >> DTC Troubleshooting >> P0602-Control Module Programming Error/Not Programmed >> Theory Of Operation

Theory Of Operation

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Each Powertrain Control Module (PCM) has an internal identifier that is programmed in the memory by the manufacturer. The PCM internal identification is checked each time the ignition is turned on.

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