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Fiat
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2019
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500L Trekking
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Repair and Diagnosis
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Engine Performance
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System
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1.4L - DTCS P0016-00 To P0270-00
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DTC Troubleshooting
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P0031-00-O2-Sensor 1/1 Heater Circuit Low
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When Monitored
When Monitored
Battery voltage between 10.5 and 15.75 volts.
ASD Relay commanded on.
The O2 Sensor Heater is commanded on.
The O2 Sensor Heater circuit high fault is not active.