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
The crankshaft position sensor is a hall effect type sensor that monitors crankshaft position and speed There are 4 teeth 90 degrees apart on the front of the crankshaft sprocket that induce an alternating current in the sensor which is transmitted to the 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 the result of a hard failure or an intermittent condition.
- This step checks the 5-volt reference circuit.
- This step checks the ground circuit.
- This step checks the sensor and harness wiring.
NO RELATED
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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.