OBD Guide

P04C3

Fuel Fill Door Lock Position Sensor/Switch Circuit

P04C3 is an OBD-II diagnostic trouble code meaning: Fuel Fill Door Lock Position Sensor/Switch Circuit. Common causes: open or short circuit in the sensor circuit, lock 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

  • Check Engine Light Is On
  • Problems with opening/closing the fuel filler flap
  • Errors in the EVAP system

Causes

  • Open or short circuit in the sensor circuit
  • Lock position sensor malfunction
  • Wiring harness damage
  • Contact corrosion
  • Problems with the control unit (ECU)

How to Fix

  1. Check the integrity of the wiring harness and contacts
  2. Check the resistance of the lock position sensor
  3. Replace sensor if necessary
  4. Clean contacts from corrosion
  5. Check the operation of the EVAP system

Related codes

Error P04C3 by Vehicle Brand

FAQ

What does the P04C3 code mean?

P04C3 is an OBD-II diagnostic trouble code that indicates: Fuel Fill Door Lock Position Sensor/Switch Circuit

What causes a P04C3 error code?

The most common causes of P04C3 include: Open or short circuit in the sensor circuit; Lock position sensor malfunction; Wiring harness damage; Contact corrosion.

How do I fix a P04C3 diagnostic trouble code?

To fix P04C3: Check the integrity of the wiring harness and contacts. Check the resistance of the lock position sensor. Replace sensor if necessary. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P04C3?

Limited driving only, diagnose soon

How much does it cost to fix P04C3?

The estimated repair cost for P04C3 is $22–56. Actual cost depends on your vehicle, location, and labor rates.

See also: Russian version · NationStat