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Fiat
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2021
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500X Pop
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Repair and Diagnosis
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Engine Performance
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System
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1.3L - DTCS P0121 To P02EE
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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:
Battery voltage between 11.0 and 15.75 volts.
With the engine running.