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
FUNCTIONS WITHIN THE SYSTEM
ECM detects malfunction of crankcase ventilation system by operating crankcase ventilation valve and control inside pressure of crankcase.
INDIVIDUAL FUNCTION WITHIN THE SYSTEM
Crankcase pressure sensor outputs pressure difference between the internal pressure of engine crankcase and the ambient pressure.
INDIVIDUAL OPERATION
Crankcase pressure sensor use piezoelectric element on its diaphragm and output voltage changes by changing of relative pressure inside and outside of engine.
Component Location
The crankcase pressure sensor is installed to the upper of front cover.
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.