OBD Guide
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P04C6

Fuel Fill Door Lock Position Sensor/Switch Circuit High

P04C6 is an OBD-II diagnostic trouble code meaning: Fuel Fill Door Lock Position Sensor/Switch Circuit High. Common causes: broken lock position sensor circuit wire, short circuit to power in the sensor circuit. Estimated repair cost: $17–67.

Severity
✅ Low
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$17–67 (est.)

Symptoms

  • Check Engine Light Is On
  • The system does not confirm that the fuel filler cap is locked.
  • There may be problems opening the lid with the button
  • Errors in the operation of the fuel filler access control system

Causes

  • Broken lock position sensor circuit wire
  • Short circuit to power in the sensor circuit
  • Faulty lock position sensor/switch
  • Oxidation or damage to the sensor connector
  • ECU malfunction

How to Fix

  1. Read error codes with a scanner and record the data
  2. Find the fuel tank cap lock position sensor according to the diagram
  3. Check the voltage at the sensor connector with a multimeter
  4. Check resistance and wiring integrity
  5. Inspect the connector for oxidation and damage.
  6. Replace the sensor if it is confirmed to be faulty
  7. Reset the error and take a test drive

Related codes

P04C2P04DCP04C5

Error P04C6 by Vehicle Brand

AcuraAudiBAICBMWBYDBuickCadillacChanganCheryChevroletChryslerCitroenDodgeDongfengExeedFAWFordForthingFotonGACGMGMCGeelyGreat WallHavalHondaHongqiHyundaiInfinitiJACJaecooJaguarJeepJetourKaiyiKiaLadaLexusLi AutoLifanLincolnLivanMazdaMercedes-BenzMercuryMitsubishiNIONissanOldsmobileOmodaOpelPeugeotPlymouthPontiacRenaultSWMSaturnSkodaSkywellSubaruSuzukiTankToyotaVolkswagenVolvoVoyahXPengZeekrZotye

FAQ

What does the P04C6 code mean?

P04C6 is an OBD-II diagnostic trouble code that indicates: Fuel Fill Door Lock Position Sensor/Switch Circuit High

What causes a P04C6 error code?

The most common causes of P04C6 include: Broken lock position sensor circuit wire; Short circuit to power in the sensor circuit; Faulty lock position sensor/switch; Oxidation or damage to the sensor connector.

How do I fix a P04C6 diagnostic trouble code?

To fix P04C6: Read error codes with a scanner and record the data. Find the fuel tank cap lock position sensor according to the diagram. Check the voltage at the sensor connector with a multimeter. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P04C6?

Yes, but get it checked soon

How much does it cost to fix P04C6?

The estimated repair cost for P04C6 is $17–67. Actual cost depends on your vehicle, location, and labor rates.

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