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E240 (211) P0161 Fault: O2 Sensor Heater Circuit Issue in Bank 2 Sensor 2

Model: E240 Fault Code: P0161 Posted: 2017-05-14 04:13

Power training The Diagnostic Trouble Code (DTC) P0161 indicates a heater circuit malfunction in the oxygen sensor located on Bank 2, Sensor 2 of an E240 (211) model vehicle. This code typically points to one or more of the following potential issues: - Open circuit in the HO2S heater power path - Open ground circuit for the HO2S heater - Signal tracking failure due to oil or moisture contamination in the sensor connector - Physical damage or failure of the oxygen sensor itself - Possible failure of the Powertrain Control Module (PCM) This sensor is located on the left side of the vehicle (nearside) after the catalytic converter, which is accessible when sitting behind the steering wheel. A multimeter can be used to test continuity and resistance in the heater circuit for diagnosis. For detailed testing procedures, refer to online guides on how to test oxygen sensors using a multimeter.

Related fault codes
P0161
Comments (2)
Anonymous 2017-05-14 11:02

A P0161 code may indicate one or more of the following conditions: - Open heater power circuit in the HO2S - Open ground circuit for the HO2或S heater - Signal tracking failure caused by oil or moisture in the sensor connector - Oxygen sensor damage or complete failure - Possible PCM malfunction

Anonymous 2017-05-15 17:04

P0161: O2 Sensor Heater Circuit Malfunction (Bank 2, Sensor 2) This refers to the heater element of the HO2S on Bank 2, Sensor 2. It is located on the left side (nearside) of the vehicle, behind the catalytic converter when seated behind the steering wheel. The sensor can be tested using a multimeter. For step-by-step testing instructions, search online for 'how to test oxygen sensor with multimeter'.