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Home >> Jeep >> 2021 >> Cherokee Altitude, FWD >> Repair and Diagnosis >> Engine Performance >> System >> 2.4L - DTCS B1810 To P0197 >> DTC Troubleshooting >> P0135-O2 Sensor 1/1 Heater Performance >> Possible Causes

Possible Causes

Possible Causes
HIGH RESISTANCE IN THE O2 SENSOR 1/1 HEATER CONTROL CIRCUIT
HIGH RESISTANCE IN THE GROUND CIRCUIT
OXYGEN (O2) SENSOR 1/1
POWERTRAIN CONTROL MODULE (PCM)

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to  PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE  . 

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