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P0131 Diagnostic Trouble Code Discussion for February 2009

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
2004 Mercedes-Benz E320 4Matic 3.2L rich on bank 2 VIN: WDBUH82J24
P0131: B1S1 O2 circuit low volts. Thanks for your time. Looking for another idea on this Mercedes. It came to us after it stalled & wouldn't restart in the bitter below 0 cold. Customer replaced iridium plugs and got it to start. Had the O2 & misfire codes in memory. Found the fuel pre...
February 03, 2009
1996 Chevrolet Tahoe LS 5.7L Hesitation, lack of power VIN: 1GNEK13RXT
P0131: Heated Oxygen Sensor (Bank 1 Sensor 1) Circuit Low Voltage. vehicle came in with low voltage codes for both front o2's as well as a p0134 - no activity B1S1. Both sensors flatline intermittantly - checked heater ckt - fuse OK - checked fuel pressure - 56-62psi is spec - measured 54 - replaced fuel filter - no change. C...
February 24, 2009