Emissions

P00FE — EVAP Fuel Tank Vapor Line Restricted or Blocked

Severity: low Safe to drive

What P00FE means

The EVAP system captures fuel vapor from the tank, stores it in a charcoal canister and later burns it in the engine through the purge valve. During its self-test the PCM watches pressure sensor readings to see how vapor flows from the tank. P00FE means the tank vapor line is clogged, pinched or blocked, so pressure or vacuum does not behave as expected.

Symptoms

  • Check engine light on
  • EVAP monitor not completing or failing
  • Fuel pump nozzle clicking off repeatedly while refueling
  • Fuel smell near the vehicle or tank
  • Tank swelling or a hiss when opening the cap
  • Inaccurate fuel gauge after refueling

Possible causes

  1. Clogged, kinked or pinched tank vapor hose or line
  2. Faulty fuel tank pressure sensor or differential pressure sensor
  3. Stuck or clogged purge valve or vent valve
  4. Damaged wiring or connector in the EVAP pressure sensor circuit
  5. Clogged or damaged charcoal canister
  6. Blocked rollover or fill limit vent valve in the tank
  7. Rarely, a PCM calibration issue

How to diagnose

  1. Read codes and freeze frame data and note any other EVAP codes
  2. Check the fuel cap for a tight fit and a good seal
  3. Inspect vapor hoses and lines from the tank to the canister for kinks, crushing, cracks, dirt or insect nests
  4. View the tank pressure sensor reading on a scan tool, key on and engine off
  5. Command the purge and vent valves on and verify they click and flow
  6. Test sensor and valve wiring for power, ground, signal and corrosion
  7. Gently flow low-pressure air through the line to confirm it is open
  8. Look for manufacturer bulletins on PCM software for this model

Common fixes

  • Clear or replace the clogged or pinched vapor hose or line
  • Replace a faulty tank pressure sensor
  • Replace a bad purge or vent valve
  • Repair wiring or connectors in the sensor circuit
  • Replace a clogged canister
  • Update PCM software per manufacturer bulletin

P00FE on different brands

Ford · manuals
On Ford, P00FE:9C is used in the 2024-2025 gasoline engine monitor strategy to flag a restricted or blocked tank vapor line; it names the detected condition, not a confirmed failed part.

Questions and answers

Can I drive with code P00FE?

Usually yes, because the engine keeps running normally. Still, do not wait too long to fix it, as vapors are not handled properly and the warning light can hide new problems.

What most often causes P00FE?

Most often a pinched or clogged vapor hose, a faulty valve or a bad pressure sensor. Start by inspecting the hoses and testing the valves with a scan tool.

Will a new gas cap fix P00FE?

Rarely. A bad cap usually sets leak codes, while P00FE points to a blockage in the line. Still, make sure the cap is seated tightly.

This is general information about the code. The meaning can differ between makes and models: a scan tool and the repair manual for your car will show the exact cause.