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Possible Causes

WARNING: This page is about a different car, the 2014 Dodge Journey. However, it is still accessible from the selected car via links, so may be relevant.
POSSIBLE CAUSES
(K141) O2 1/2 SIGNAL CIRCUIT SHORTED TO VOLTAGE
(K904) O2 1/2 RETURN CIRCUIT SHORTED TO VOLTAGE
(K141) O2 1/2 SIGNAL CIRCUIT SHORTED TO THE (K299) O2 1/2 HEATER CONTROL CIRCUIT
(K141) O2 1/2 SIGNAL CIRCUIT OPEN OR HIGH RESISTANCE
(K904) O2 1/2 RETURN CIRCUIT OPEN OR HIGH RESISTANCE
OXYGEN SENSOR 1/2
POWERTRAIN CONTROL MODULE (PCM)

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

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