P04B5

Symptoms

• The Check Engine light comes on
• Noticeable gasoline vapors near the filler neck
• Increased fuel consumption

Causes

• Mechanical damage to the fuel tank cap or filler neck
• Fuel filler position sensor malfunction
• Closing mechanism is dirty or stuck
• Open or shorted sensor wiring harness

How to Fix

1. Check the mechanical condition of the fuel tank cap and filler neck
2. Check the fuel filler position sensor for damage.
3. Clean and lubricate the closing mechanism
4. Check the integrity of the sensor wiring harness
5. Replace faulty components if necessary
6. Reset the error using an OBD-II scanner

Related codes

Error P04B5 by Vehicle Brand