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Home >> Jeep >> 2023 >> Grand Cherokee Altitude, AWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 61 (5.7L - DTCS P0133 To P0175) >> DTC Troubleshooting >> P0161 O2 Sensor 2/2 Heater Performance >> Possible Causes

Possible Causes

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Possible Causes
O2 SENSOR 2/2 HEATER CONTROL CIRCUIT OPEN/HIGH RESISTANCE
O2 SENSOR 2/2 HEATER GROUND CIRCUIT OPEN/HIGH RESISTANCE
OXYGEN (O2) SENSOR 2/2
POWERTRAIN CONTROL MODULE (PCM)

Always perform the PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE before proceeding. Refer to  PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE  .