1998 GMC Truck B2S2 O2 Sensor

1998 GMC TRUCK
115,000 MILES • V8 • 4WD • AUTOMATIC
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RONDOMN
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  • 1 POST
I have had the Check Engine Light go on serveral times over a period of time. It always indicates that there is a problem with the B2S2 O2 sensor. I have replace the sensor 2 times. In both cases before testing shows no changes in voltage, after the change the voltage fluxuates. It seems strange that the same senors keeps going out. Is there any thing else I should be looking at? I have verified the resistance of the wiring between the engine compartment and the sensor, it is within specs.
Nov 1, 2010 at 10:17 PM
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BLUELIGHTNIN6
  • ✓ASE Certified Mechanic
  • 16,542 POSTS
  • ASE Certified Mechanic
cataltyic converter is most likely at fault here and not the sensor itself
Nov 1, 2010 at 10:36 PM
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