Join Now
International Automotive Technicians Network

P0161 Diagnostic Trouble Code Discussion for June 2012

Heated Oxygen Sensor (Bank 2 Sensor 2) Heater Performance


Note: This is a professional automotive technician's resource.
Vehicle Owners: If you are seeking an automotive repair professional to service your vehicle, visit the iATN Repair Shop Finder.

Trouble Ticket Help Requests for DTC P0161
Help Request Posted
1997 Mercedes-Benz S420 4.2L MIL Lamp on VIN: WDBGA43G5V
P0161: b2s2 oxygen sensor heater circuit. I need some help on a crazy oxygen sensor car. It has been to 2 dealers and here for rear oxygen sensor codes. oxygen sensors have been replaced by both dealers and by us, with bosch and oem parts, problem still returns. All wiring has been checked, for ground...
June 06, 2012
1998 Mercedes-Benz E320 3.2L MIL Lamp on VIN: WDBJF65F1W
P0161: O2 Sensor heater left O2 after TWC. Good morning, I'm trying to find what ground signal or what is normal for the rear heater circuit on this vehicle. I have my voltage going to O2's, and the computer is grounding the O2's for 100ms, 1 time every second. For the 100ms the rear heaters are on the...
June 27, 2012
1997 Mercedes-Benz S420 4.2L MIL Lamp on VIN: WDBGA43G5V
P0161: b2s2 oxygen sensor heater circuit. I need some help on a crazy oxygen sensor car. It has been to 2 dealers and here for rear oxygen sensor codes. oxygen sensors have been replaced by both dealers and by us, with bosch and oem parts, problem still returns. All wiring has been checked, for ground...
June 06, 2012
1998 Mercedes-Benz E320 3.2L MIL Lamp on VIN: WDBJF65F1W
P0161: O2 Sensor heater left O2 after TWC. Good morning, I'm trying to find what ground signal or what is normal for the rear heater circuit on this vehicle. I have my voltage going to O2's, and the computer is grounding the O2's for 100ms, 1 time every second. For the 100ms the rear heaters are on the...
June 27, 2012