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P0156 Diagnostic Trouble Code Discussion for April 2010

Heated Oxygen Sensor (Bank 2 Sensor 2) Closed Loop Fuel Control

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Trouble Ticket Help Requests for DTC P0156
Help Request Posted
2001 Mercedes-Benz S430 4.3L MIL Lamp on VIN: WDBNG70J81
P0156: O2 Sensor B2S2 open circuit. ... P0150, P0136, and P0156. The customer states that this has been a recurring issue since well before the vehicle was out of warranty. The dealer was unable to find any problem, but replaced all 4 O2 sensors as a matter of cour...
April 28, 2010