po133,po153 1998 explorer 4.0 - NY
<HR style="COLOR: #d1d1e1" SIZE=1 itxtvisited="1"><!-- / icon and title --><!-- message --><TABLE width="100%" border=0 itxtvisited="1"><TBODY itxtvisited="1"><TR itxtvisited="1"><TD vAlign=top itxtvisited="1">hey! I'm new to this site and want to say hi to all its members. I'm looking for help with a problem on my 98 explorer 4.0 sohc . My MIL light is on and a scanner shows 2 trouble codes PO133 and PO153 , O2 sensor circuit slow responce etc. With engine running all 4 02 sensors are showing 0.000 volts and the short and long term fuel trim 1 & 2 are at -100% . The engine has 100 K on it and I know that none of the 02 sensors have ever been replaced. Is it possible for all 4 sensors to fail at the same time? Is their circuit fused? Any help would be greatly appreciated.
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I think the circuit is fused. It is not normal for all the sensors to fail at once. The sensors are probably due for replacement, but even if they were bad, they wouldn't behave as they are doing now. Something else is causing the problem. Be sure to check the connections, and corrosion or brocken wires might cause problems. I'm not sure where the fuse is, but I'm sure someone will jump on soon and share their knowledge on that issue.