Home >> Jeep >> 2017 >> Cherokee Latitude, 3.2L Eng VIN S, AWD, Automatic T/Case Control, Gas >> Repair and Diagnosis >> Engine Performance >> System >> 3.2L - DTCS B104D To P0123 >> DTC Troubleshooting >> P0051-O2-Sensor 2/1 Heater Circuit Low >> When Monitored