OBD Guide
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P04B5

Fuel Fill Door Stuck Open

P04B5 is an OBD-II diagnostic trouble code meaning: Fuel Fill Door Stuck Open. Common causes: mechanical damage to the fuel tank cap or filler neck, fuel filler position sensor malfunction. Estimated repair cost: $22–56.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$22–56 (est.)

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

P0455P0456P0457

Error P04B5 by Vehicle Brand

AcuraAudiBAICBMWBYDBuickCadillacChanganCheryChevroletChryslerCitroenDodgeDongfengExeedFAWFordForthingFotonGACGMGMCGeelyGreat WallHavalHondaHongqiHyundaiInfinitiJACJaecooJaguarJeepJetourKaiyiKiaLadaLexusLi AutoLifanLincolnLivanMazdaMercedes-BenzMercuryMitsubishiNIONissanOldsmobileOmodaOpelPeugeotPlymouthPontiacRenaultSWMSaturnSkodaSkywellSubaruSuzukiTankToyotaVolkswagenVolvoVoyahXPengZeekrZotye

FAQ

What does the P04B5 code mean?

P04B5 is an OBD-II diagnostic trouble code that indicates: Fuel Fill Door Stuck Open

What causes a P04B5 error code?

The most common causes of P04B5 include: 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 do I fix a P04B5 diagnostic trouble code?

To fix P04B5: Check the mechanical condition of the fuel tank cap and filler neck. Check the fuel filler position sensor for damage.. Clean and lubricate the closing mechanism. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P04B5?

Limited driving only, diagnose soon

How much does it cost to fix P04B5?

The estimated repair cost for P04B5 is $22–56. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat