P04FB

Symptoms

• Check Engine Light Is On
• Possible unstable idle operation
• Increased oil consumption when the system is depressurized
• Oil smell when engine is running

Causes

• Sensor contamination with oil deposits
• Mechanical damage to the sensor
• Unstable connection in the sensor connector
• Partial disconnection of the crankcase ventilation hose
• Damage to sensor wiring

How to Fix

1. Read error codes and check for related codes
2. Inspect the crankcase ventilation hoses for disconnects and cracks.
3. Clean the sensor from oil deposits
4. Check the sensor connector and wiring for unstable connections.
5. Measure the voltage of the sensor signal in different engine operating modes
6. Replace the sensor if the parameters do not correspond to the norm
7. Reset the error and check the system in several modes

Related codes

Error P04FB by Vehicle Brand