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Home >> Chrysler >> 2025 >> Pacifica Plug-In Hybrid Select >> Repair and Diagnosis >> Engine Performance >> System >> 3.6L - DTCS P0155 To P018B >> DTC Troubleshooting >> P0159 O2 Sensor 2/2 Slow Response >> Possible Causes

Possible Causes

Possible Causes
EXHAUST LEAK
O2 SENSOR 2/2 SIGNAL CIRCUIT
O2 SENSOR 2/2 RETURN CIRCUIT
O2 SENSOR 2/2

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