1985-1998 [Subscribe to Daily Digest] |
Oxygen percentage is not constant all the time. At higher altitudes it can be almost non-existant. The Probst book explains this rather well. The signal out is proportional to the difference between the outside and inside of the sensor. Look close at the sensor and you will notice that the outer cover does not bond the the area where the wrench flats are. Outside air has to get in there. I fixed more than 1 4X4 truck that had mud packed in there by simply cleaning the outside of the sensor with soap and water.
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