P0320 is crankshaft sensor related. Either the wiring is faulty, or the sensor is bad. As they are known for failing you might try a replacement unit.
Testing for bias voltage is OK but you won't actually be able to see if either sensor is working because they don't use a constant voltage, they send a digital signal that can be seen with an oscilloscope, but not with a meter.
Friday, August 4th, 2017 AT 3:57 PM