As the Durametric is reading it from the DME, the ECU must not be getting the signal. You may need to check the entire circuit from the sensor to the DME plug for continuity. For that, you will need a digital multimeter and a wiring diagram specific to your model and year in order to find the correct pins on the DME plug. If the wiring checks out, your next suspect is the DME itself.
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“Anything really new is invented only in one’s youth. Later, one becomes more experienced, more famous – and more stupid.” - Albert Einstein
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