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P0151 Diagnostic Trouble Code Discussion for October 2005

Air Fuel Sensor (Bank 2 Sensor 1) Circuit Low Input (Lean Shift)

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Trouble Ticket Help Requests for DTC P0151
Help Request Posted
1997 Cadillac DeVille 4.6L Hesitation, MIL Lamp on VIN: 1G6KD54Y6V
P0151: Heated Oxygen Sensor (Bank 2 Sensor 1) Circuit Low Voltage. Severe hesitation and boggs on WOT. Replaced MAF sensor. Condition did not change. O2 sensor readings appear to be switching normally. On light acceleration, problem does not occur, only when mashing on throttle. Any help would be appreciated.
October 11, 2005
1997 GMC K1500 Sierra SL 4.3L Cuts out, Misfire, MIL Lamp on VIN: 1GTEK19W0V
P0151: Heated Oxygen Sensor (Bank 2 Sensor 1) Circuit Low Voltage. I need some help on this one. This truck came in to the shop with check engine light on and fuel pump screaming. I told customer we have to fix the obvious noisey fuel pump first, which we did with an AC Delco pump and new fuel filter. Cleared codes to aid fur...
October 19, 2005