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Jeep
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2020
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Compass Trailhawk
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Repair and Diagnosis
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Engine Performance
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System
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2.4L - DTCS P104D To P0140
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DTC Troubleshooting
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P0031-O2 Sensor 1/1 Heater Circuit Low
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Default Action
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Default Action
The MIL will illuminate.
The PCM will disable the O2 Sensor Heater driver for the remainder of this ignition cycle.