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P0161 Diagnostic Trouble Code Discussion for December 2005

Heated Oxygen Sensor (Bank 2 Sensor 2) Heater Performance

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Trouble Ticket Help Requests for DTC P0161
Help Request Posted
1999 Mercedes-Benz ML430 4.3L MIL Lamp on VIN: AJGAB72E7X
P0161: Bank 2 Sensor 2 O2 heater circuit. Hi Mercedes Gurus, This car came in with codes P0173, P0156 & P0170. We replaced both rear O2 sensors and the Mass Air Sensor and now we get the P141/161 codes during warm up or sustained idling. Looking into the situation further we find that the ECM is ...
December 19, 2005