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Home >> Jeep >> 2015 >> Compass Limited, AWD, Automatic Trans >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> 2.0L & 2.4L - DTCS P000A To P0302 >> DTC Troubleshooting >> DTC P0031: -O2 Sensor 1/1 Heater Circuit Low >> Possible Causes

Possible Causes

Possible Causes
(K99) O2 1/1 HEATER CONTROL CIRCUIT SHORTED TO GROUND
(K99) O2 1/1 HEATER CONTROL CIRCUIT OPEN OR HIGH RESISTANCE
(Z909) GROUND CIRCUIT OPEN OR HIGH RESISTANCE
OXYGEN 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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