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P0161 Diagnostic Trouble Code Discussion for April 2015

Heated Oxygen Sensor (Bank 2 Sensor 2) Heater Performance


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Trouble Ticket Help Requests for DTC P0161
Help Request Posted
2004 Ford Freestar SES 3.9L Misfire VIN: 2FMZA57624
P0161: Rear O2 Sensor HEATER CIRCUIT Bank 2. ... time to drive it. Replaced rear O2 sensors (had 7+ ohms heater readings)with 3.4 ohm (measured) OE sensors and this seems to have cured P0141/P0161. In testing for O2 circuit problem we checked wiring/power/shorts/grounds/PCM switching - all seems fine. ...
April 22, 2015