OBD Guide

P04C9

Fuel Fill Door Open Request Sensor/Switch Performance/Stuck Off

Severity
Low
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$22–56 (est.)

Symptoms

  • Check Engine Light Is On
  • Problems with refueling
  • EVAP system errors

Causes

  • Malfunction of the sensor or switch of the fuel tank hatch
  • Open or shorted wiring harness
  • Mechanical damage to the fuel tank hatch
  • Problems with sensor contacts

How to Fix

  1. Check the condition of the fuel tank hatch sensor and switch
  2. Check the integrity of the wiring harness and contacts
  3. Replace a faulty sensor or switch
  4. Clean or replace damaged contacts

Related codes

Error P04C9 by Vehicle Brand