I have a 97 GMC Jimmy. I am getting a P0131 code all the time and a P0151 sometimes. I replace the Bank 1 sensor 1 in January and had no problem all summer. Now out of nowhere, i am getting the code again and having driving issues. First thing in the morning, I can drive about 10 mile and then the truck starts bucking and I lose power up hills or on take offs from a stop or passing. If I give it a slow steady gas pedal, i can nurse it along. If I pull over and turn the truck off and tunrn it back on, I am good for another 10 miles or depends on the stop and go traffic or hills. I check all the connections. The code says low voltage to bank 1 sensor 1. What could be causing this? Any tips or help would be great. Thanks
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Did the cat 2yrs ago. did a full tune up last year. new fuel pump in sept 08. new fuel filter in jan 09. do you know what the volts need to be on the computer side and what the volts need to be at the sensor plug when it is running?