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2025
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Grand Cherokee L Summit
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Repair and Diagnosis
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Engine Performance
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System
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3.6L - DTCS U110F To U11BF
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DTC Troubleshooting
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U1133 Lost Stop/Start Switch 1 Message
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Set Condition
Set Condition
The Powertrain Control Module (PCM) either doesn't receive a Stop/Start bus message or receives an implausible bus message from the Body Control Module (BCM).