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P0131 Diagnostic Trouble Code Discussion for April 2010

Air Fuel Sensor (Bank 1 Sensor 1) Circuit Low Input (Lean Shift)

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Trouble Ticket Help Requests for DTC P0131
Help Request Posted
2005 Subaru Impreza RS 2.5L MIL Lamp on VIN: JF1GG67565
P0131: Air Fuel Sensor (Bank 1 Sensor 1) Low Voltage. ... by us with a Subaru part Oct. 2008 about 32k miles ago. At that time, fault code P2097 was set: "POST CATALYST FUEL TRIM SYSTEM TOO RICH BANK 1". At that time, engine data showed the rear o2 sensor reading rich most of the time while steady cruisin...
April 01, 2010
2000 Subaru Legacy GT Limited 2.5L MIL Lamp on VIN: 3SEBS456RW
P0131: Air Fuel Sensor (Bank 1 Sensor 1) Circuit Low Voltage. HI guys -please ignore the vin I am home now and my mind is racing here. Last year this car came in with a 420 code and the cust wouldnt spring for a subaru conv. We replaced the ft sensor with a subaru unit and the rear w aft market. The converter was a Walk...
April 26, 2010
2006 Subaru Legacy 2.5i 2.5L MIL Lamp on VIN: 453BL62676
P0131: Air Fuel Sensor (AFS 1/1) Circuit Low Voltage. Code sets after about 15 minutes of run time. I use a snapon modis scanner and have monitored the o2 sensors. At the time of the code set I have taken a snap shot with the graphing mode and found that the rear o2 sensor drops out to zero and the front o2 senso...
April 27, 2010
1995 Oldsmobile 88 Royale 3.8L Poor Idle Quality, Hesitation, Cuts out, Stall VIN: 1G3HN52KXS
P0131: Oxygen sensor lean. This vehicle will intermittantly cut out and stall,run bad and then run good for awhile.Seems to happen after about half an hour of running.We have replaced maf sensor twice,crank sensor,wires,O2 sensor,Lifted the upper plenum and replaced gaskets,checked inje...
April 28, 2010