Ok i just got my scanmaster hooked up and i love it......the only thing that seems to be wrong is my right o2 sensor voltage is right around 240 when first started up and the other one is at 810 or so my sheet that came with the scan master says they should be both around the 800 mark....My car is fouling plugs on the passenger side with in 30 minutes of driving with new ones....once i replace my right o2 sensor should this fix the problem.....i sure hope so this is the only thing from keeping me from driving the car....thanks again for answers or any help given....

 

Cant replace just 1 02...suxs man i am sorry but them minute you replace 1 the other 1 craps out...as long as your undewr there replace both

Matt

 

When you start the car "cold" both O2 sensors should read 450mV. They are cold, will not generate any voltage accross the sensing membrane, so all you see on the scanner is the voltage supplied by the PCM. As the O2 sensors start to warm up, the voltage will drop close to 005mV, the PCM will kick in to closed loop and they should start to cycle from 0xx - 9xx mV. If you don't have an AIR pump, the voltage might not drop as described above.

http://members.aol.com/InjuneerZZ/ScanMast.htm