Crankcase Ventilation Hose Connection Sensor Circuit High

Common symptoms

What you'll notice

• Inspect and repair any loose or damaged connections in the crankcase ventilation hose.
• Clean or replace the crankcase ventilation hose to ensure proper airflow.
• Check and replace the sensor circuit if necessary.
• Inspect the engine for any oil or debris buildup that may be affecting the sensor readings.
• Reset the vehicle's computer system to clear any error codes and see if the issue persists.

Common causes

Most likely first

1. Loose or disconnected crankcase ventilation hose
2. Faulty crankcase ventilation sensor
3. High resistance or open circuit in the sensor circuit
4. Sensor circuit wiring harness damaged or shorted
5. Faulty engine control module (ECM) or powertrain control module (PCM)

How to diagnose & fix

Work through it in order

1. Check Engine Light (CEL) illuminates on the dashboard
2. Decreased engine performance or power
3. Rough idling or stalling of the engine
4. Increased fuel consumption
5. Engine misfires or hesitates