LEMON Manuals: Even more car manuals for everyone
Home >> Jeep >> 2009 >> Commander Overland, 4WD >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> DTCS P0125 To P0196 - NGC >> P0139-O2 Sensor 1/2 Slow Response >> Possible Causes

Possible Causes

Possible Causes 
EXHAUST LEAK
(K141) O2 1/2 SIGNAL CIRCUIT
(K904) O2 RETURN DOWNSTREAM CIRCUIT
1/2 O2 SENSOR

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. See  DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure  . 

scientia non olet · About LEMON Manuals