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Home >> Jeep >> 2007 >> Commander Overland, 4WD >> Repair and Diagnosis >> Engine Performance >> System >> DTCS P0123 To P0174 >> P0155-O2 Sensor 2/1 Heater Performance >> Monitor Conditions

Monitor Conditions

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  1. When Monitored: 

    Engine running and heater duty cycle greater than 0%. Battery voltage greater than 11.0 volts.