Crankcase Ventilation Hose Connection Sensor Circuit

Common symptoms

What you'll notice

• Inspect the crankcase ventilation hose for any leaks or disconnected connections.
• Check the sensor circuit wiring and connections for any faults or damages.
• Replace the crankcase ventilation hose if it is cracked or damaged.
• Replace the sensor if it is malfunctioning or giving inaccurate readings.

Common causes

Most likely first

1. Loose or disconnected crankcase ventilation hose
2. Faulty or malfunctioning crankcase ventilation sensor
3. Wiring issues or loose connections in the sensor circuit
4. Clogged or blocked crankcase ventilation system
5. Defective engine control module (ECM) or faulty software/calibration

How to diagnose & fix

Work through it in order

1. Check engine light illuminates on the dashboard
2. Loss of power or decrease in acceleration
3. Rough idle or stalling of the engine
4. Increased fuel consumption
5. Engine misfires