OBD Guide
ENFRDEESPT

P04DC

Fuel Fill Door Position Sensor/Switch Circuit Range/Performance

P04DC is an OBD-II diagnostic trouble code meaning: Fuel Fill Door Position Sensor/Switch Circuit Range/Performance. Common causes: faulty fuel cap position sensor, damage or displacement of the sensor due to impact. Estimated repair cost: $22–78.

Severity
✅ Low
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$22–78 (est.)

Symptoms

  • Check Engine Light Is On
  • The system does not correctly determine the position of the tank cap
  • Possible false alarms about an open lid
  • Intermittent malfunctions of the lid locking system

Causes

  • Faulty fuel cap position sensor
  • Damage or displacement of the sensor due to impact
  • Oxidation of sensor connector contacts
  • Unstable voltage in the sensor circuit
  • Mechanical damage to the sensor housing

How to Fix

  1. Read error codes and check freeze frame data
  2. Inspect the cover position sensor for physical damage
  3. Check that the sensor is installed correctly
  4. Measure the signal voltage at different positions of the cover with a multimeter
  5. Clean the connector and contacts from oxidation
  6. Check the wiring for chafing and unstable connections.
  7. Replace the sensor if the characteristics are outside the norm
  8. Reset the error and check the system operation

Related codes

P04C2P04C6P04DDP04DE

Error P04DC by Vehicle Brand

AcuraAudiBAICBMWBYDBuickCadillacChanganCheryChevroletChryslerCitroenDodgeDongfengExeedFAWFordForthingFotonGACGMGMCGeelyGreat WallHavalHondaHongqiHyundaiInfinitiJACJaecooJaguarJeepJetourKaiyiKiaLadaLexusLi AutoLifanLincolnLivanMazdaMercedes-BenzMercuryMitsubishiNIONissanOldsmobileOmodaOpelPeugeotPlymouthPontiacRenaultSWMSaturnSkodaSkywellSubaruSuzukiTankToyotaVolkswagenVolvoVoyahXPengZeekrZotye

FAQ

What does the P04DC code mean?

P04DC is an OBD-II diagnostic trouble code that indicates: Fuel Fill Door Position Sensor/Switch Circuit Range/Performance

What causes a P04DC error code?

The most common causes of P04DC include: Faulty fuel cap position sensor; Damage or displacement of the sensor due to impact; Oxidation of sensor connector contacts; Unstable voltage in the sensor circuit.

How do I fix a P04DC diagnostic trouble code?

To fix P04DC: Read error codes and check freeze frame data. Inspect the cover position sensor for physical damage. Check that the sensor is installed correctly. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P04DC?

Do not drive — repair immediately

How much does it cost to fix P04DC?

The estimated repair cost for P04DC is $22–78. Actual cost depends on your vehicle, location, and labor rates.

FRDEESPT

See also: Russian version · NationStat