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Jeep
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2021
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Gladiator Mojave, Part Time T/Case Control, Standard Trans
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Repair and Diagnosis (Single Page)
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Engine Performance
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System
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3.6L (GPEC 2A) - DTCS P1055 To P1496
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DTC Troubleshooting
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P1128-Closed Loop Fueling Not Achieved - Bank 1 Upstream
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Set Condition
Set Condition
Once the enable time has been reached and all enable conditions are met, the diagnostic will check for closed loop fuel control. If closed loop control is not active by the time the enable timer has expired, the diagnostic will fail.