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Home >> Jeep >> 2007 >> Wrangler X, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> DTCS P0128 To P0202 >> P0159-O2 Sensor 2/2 Slow Response >> Possible Causes

Possible Causes

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Possible Causes 
EXHAUST LEAK
(K243) O2 2/2 SIGNAL CIRCUIT
(K904) O2 RETURN DOWNSTREAM CIRCUIT
O2 SENSOR

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

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