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P0161 Diagnostic Trouble Code Discussion for September 2013

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 CLK430 4.3L No Start, Poor Idle Quality VIN: WDBLJ70G6X
P0161: o2 sensor heater of g3/5-left after cat. This car will crank for a long time before starting cold. When it does finally start, it will stumble for 20 seconds or so, then runs smooth. If you put in gear it has no power cold. It runs perfect warm, with fuel trim around -5% after driving. Check engine l...
September 11, 2013