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Home >> Fiat >> 2014 >> 500 Turbo >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 5 (1.4L - I4 Non-Turbo - DTCS P0016-00 To P0354-00 - 500 & 500C) >> Diagnosis And Testing >> P0137-00-O2 Sensor 1/2 Circuit Low >> Possible Causes

Possible Causes

WARNING: This page is about a different variant/trim than selected.
Possible Causes
(K904) O2 SENSOR RETURN CIRCUIT SHORTED TO GROUND
(K141) O2 SENSOR 1/2 SIGNAL CIRCUIT SHORTED TO GROUND
(K141) O2 SENSOR 1/2 SIGNAL CIRCUIT SHORTED TO THE (K904) O2 SENSOR RETURN CIRCUIT
(K141) O2 SENSOR 1/2 SIGNAL CIRCUIT SHORTED TO THE (K299) O2 SENSOR 1/2 HEATER CONTROL CIRCUIT
O2 SENSOR 1/2
POWERTRAIN CONTROL MODULE (PCM)

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