Crankcase Ventilation Hose Connection Sensor Circuit Low

Common symptoms

What you'll notice

• Inspect the crankcase ventilation hose for any signs of damage or disconnection. Reconnect or replace the hose if necessary.
• Check the sensor circuit for any loose or damaged connections. Repair or replace any faulty wiring if needed.
• Clean the crankcase ventilation sensor with an appropriate cleaning solution to remove any dirt or debris that may be affecting its performance.
• Clear the error codes and see if they reoccur

Common causes

Most likely first

1. Crankcase ventilation hose is disconnected or loose
2. Sensor circuit wiring is faulty or damaged
3. Sensor itself is defective or malfunctioning
4. Crankcase ventilation system is clogged or blocked
5. Engine control module (ECM) or related components are experiencing issues.

How to diagnose & fix

Work through it in order

1. Check engine light illuminates on the dashboard
2. Reduced engine performance or power
3. Engine misfires or runs rough
4. Poor fuel efficiency or decreased MPG (miles per gallon)
5. Unusual noises or vibrations from the engine