Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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.
- This step determines if DTC 19 is result of a hard failure or an intermittent condition.
- This step checks 5-volt reference circuit.
- This step checks ground circuit.
- This step checks sensor and harness wiring.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.