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P0131 Diagnostic Trouble Code Discussion for October 2011

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
2006 Mitsubishi Endeavor LS 3.8L MIL Lamp on VIN: 4A4MN21S06
P0131: Heated Oxygen Sensor (Bank 1 Sensor 1) Signal Low Voltage. Costumer took truck out mudding and got stuck and it appears some water got sucked in thru intake and broke a valve and piston so we installed a used engine upon start up truck ran very bad and set o2 codes immediatly we replaced 3 of the 4 o2 sensors (because...
October 19, 2011
2000 Nissan Xterra XE 3.3L Poor Idle Quality, Stall, MIL Lamp on VIN: 5N1ED28Y8Y
P0131: Heated Oxygen Sensor (Bank 1 Sensor 1) Circuit Low Input (Lean Shift). ... dies at idle with codes p0131 and p0325. Cleared codes the knock sensor code p0325 returned immediately but not the o2 code p0131. I pulled a plug and found it to be clean and white like it is burning lean and fuel trims are fluctuate around -10% to -25% o...
October 21, 2011