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Home >> Jeep >> 2019 >> Grand Cherokee Trackhawk >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> 6.2L - DTCS P0139 To P0440 >> DTC Troubleshooting >> P0140-O2 Sensor 1/2 No Activity Detected >> When Monitored

When Monitored

This diagnostic runs continuously when the following conditions are met: