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.
Crankcase Pressure Sensor
The crankcase pressure sensor measures the vacuum in the positive crankcase ventilation (PCV) system. A change in the PCV system vacuum greater than a calibrated threshold indicates the PCV system is disconnected and will set a DTC. The crankcase pressure sensor is located in the PCV system hose between the intake air system air cleaner and the engine crankcase PCV inlet.
On some vehicles, the CKCP has one digital signal output from the sensor. There is one reference voltage circuit and one signal return circuit for the sensor. For all others, the CKCP has one analog signal output from the sensor. There is one reference voltage circuit and one signal return circuit for the sensor.
Typical Crankcase Pressure Sensor Integrated With Crankcase Ventilation Tube
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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.