No AWD...again.
Last fall we noticed our rear wheels were not engaging. Our mechanic diagnosed it as a faulty differential oil temperature/pressure sensor. He cleared the error code and ordered the part. In the week that passed before we had the part installed, the AWD worked without issue.
After the part was replaced, we enjoyed AWD for the rest of the winter.
Here we are, about one year later, and the AWD is out again. I don't know for sure when it failed, as I don't usually notice it's gone until I need it. That said, a few weeks ago, we had some rain and I decided to test the AWD. From a stop, I goosed the gas pedal. The car accelerated with no wheel spin.
Today, we're having LOTS of rain and a bit of slush and, sure enough, no AWD.
If it is the same sensor that needs replacing, why would that be the case? What is it that can wear out an oil temperature/pressure sensor in one year? Could the very wet weather be messing up the sensor or DEM?
All advice appreciated.
2003 XC70 with 345,000 km (214,370 mi)
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