DTC 19, Crankshaft Position Reference Error: Notes

Crankshaft position sensor is a Hall Effect type sensor that monitors crankshaft position and speed There are 4 teeth 90 degrees apart on front of crankshaft sprocket that induce an alternating current in sensor which is transmitted to PCM. DTC 19 will set when 8 crankshaft position pulses are missed for every cam reference pulse. PCM will default to backup fuel.

1. This step determines if DTC 19 is result of a hard failure or an intermittent condition.
2. This step checks 5-volt reference circuit.
3. This step checks ground circuit.
4. This step checks sensor and harness wiring.