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Home >> Jeep >> 2007 >> Commander Overland, 4WD >> Repair and Diagnosis >> Engine Performance >> System >> DTCS P0123 To P0174 >> P0153-O2 Sensor 2/1 Slow Response >> Possible Causes
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Possible Causes

Possible Causes 
EXHAUST LEAK
(K43) O2 2/1 SIGNAL CIRCUIT
(K902) O2 RETURN UPSTREAM CIRCUIT
2/1 O2 SENSOR

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

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