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Jeep
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2025
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Grand Cherokee 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 P0129 To P0141
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DTC Troubleshooting
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P0138 O2 Sensor 1/2 Circuit High
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When Monitored
When Monitored
This diagnostic runs continuously when the following conditions are met:
With the engine running.
Battery voltage between 11.0 volts and 15.8 volts.