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Home >> Jeep >> 2021 >> Grand Cherokee L Laredo, AWD >> Repair and Diagnosis >> Engine Performance >> System >> 3.6L - DTCS P0037 To P0152 >> Diagnosis And Testing >> P0051-O2-Sensor 2/1 Heater Circuit Low >> When Monitored

When Monitored

Battery voltage between 10.5 and 15.75 volts.
The O2 Sensor Heater is commanded on.
The O2 Sensor Heater circuit high fault is not active.

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