OBD Guide

P04BF

Fuel Fill Door Unlock Control Circuit/Open

Severity
⚠️ Medium
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$22–167 (est.)

Symptoms

  • The fuel filler flap does not open when the button is pressed
  • Error indication on the dashboard
  • The hatch lock is unstable

Causes

  • Open or short circuit in wiring harness
  • Malfunction of the electromechanical hatch lock
  • Problems with the relay or circuit fuse
  • Malfunction of the hatch opening button
  • Problems with the control unit

How to Fix

  1. Check the fuse of the corresponding circuit
  2. Inspect the wiring harness for damage
  3. Check the operation of the electromechanical lock
  4. Test the hatch release button
  5. Carry out diagnostics of the control unit

Related codes

Error P04BF by Vehicle Brand