P0142 OBD II Trouble Code 02 Sensor Circuit Malfunction (Bank I Sensor 3)

Detailed information on troubleshooting and repairing a P0142 DTC code which refers to an O2 sensor circuit malfunction on sensor number 3 on bank 1. Also includes links to relevant forum topics on the code.

Symptoms of P0142 OBD II Trouble Code

MIL (Malfunction Indicator Lamp) illumination
Decrease in MPG
Increase in tailpipe emissions

Common Causes of P0142 OBD II Trouble Code

Bad O2 sensor
Signal shorted to voltage
Wiring problems due to contact with exhaust components
Holes in exhaust near O2 sensor

P0000 OBD II Trouble Code No Diagnostic Trouble Codes Found

P0001 OBD II Trouble Code DTC Fuel Volume Regulator Control Circuit/Open

P0002 OBD II Trouble Code DTC Fuel Volume Regulator Control Circuit Range/Performance

P0003 OBD II Trouble Code DTC Fuel Volume Regulator Control Circuit Range/Performance

P0004 OBD II Trouble Code DTC Fuel Volume Regulator Control Circuit Range/Performance

P0005 OBD II Trouble Code DTC Fuel Shutoff Valve A Control Circuit/Open

P0006 OBD II Trouble Code DTC Fuel Shutoff Valve A Control Circuit Low

P0007 OBD II Trouble Code DTC Fuel Shutoff Valve A Control Circuit High

P0008 OBD II Trouble Code Engine Positions System Performance Bank 1

P0009 OBD II Trouble Code Engine Positions System Performance Bank 2

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P0142 OBD II Trouble Code 02 Sensor Circuit Malfunction (Bank I Sensor 3)

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