P00FE medium Severity

P00FE: Evaporative (EVAP) System Fuel Tank Vapor Line Restricted/Blocked

May cause check engine light; can affect EVAP monitoring and fuel vapor management but typically does not immediately impair engine running.

Overview

Generic OBD‑II code indicating a restriction or blockage in the EVAP system fuel tank vapor line detected by pressure sensors.

Common Symptoms

  • Malfunction Indicator Lamp (MIL)/check engine light illuminated
  • Potential failed EVAP system monitor
  • Fuel vapors not properly vented
  • Occasional inaccurate fuel gauge reading after refueling

Most Common Causes

Clogged or restricted EVAP fuel tank vapor line high

Blockage in the vapor line prevents normal pressure changes and is the primary failure mode observed across vehicle platforms.

Faulty fuel tank pressure sensor or differential pressure sensor medium

Incorrect sensor readings can falsely indicate a restriction when none exists.

Faulty purge or vent valve in EVAP system medium

Stuck open or closed valves can disrupt correct EVAP flow and mimic a restriction.

Harness or connector damage in EVAP pressure sensor circuits medium

Electrical faults can cause erroneous sensor input to ECM.

Manufacturer calibration/PCM configuration issue low

Certain vehicles (e.g., 2020 Escape) have TSBs noting PCM config issues triggering P00FE without mechanical fault.

Diagnostic Steps

  1. Retrieve freeze frame data and related EVAP codes (e.g., P0455, P0456) and note fuel level and driving conditions
    Expected: Check for consistency with EVAP monitor test conditions and presence of multiple EVAP codes.
    Interpretation: Confirms EVAP system involvement versus unrelated powertrain issues.
  2. Visually inspect fuel tank vapor line and EVAP hoses for kinks, blockages, or damage
    Expected: Detected physical restriction or crushed hose
    Interpretation: Physical obstruction supports true EVAP restriction.
  3. Test fuel tank pressure/differential pressure sensor circuit with multimeter/scan tool
    Expected: Normal sensor voltage and response during EVAP test
    Interpretation: Abnormal readings point to sensor or wiring faults.
  4. Operate purge and vent valves during active EVAP test via bi‑directional scan tool
    Expected: Valves actuate properly
    Interpretation: Stuck valves indicate replacement needed.
  5. If available, check manufacturer TSBs for PCM calibration issues associated with P00FE
    Expected: Identified calibration service action
    Interpretation: May require PCM reprogramming instead of mechanical repair.

Repair Solutions

Remove and clear restriction in EVAP vapor line (clean/replace hose) medium
Estimated Cost: $50 - $200

Hose replacement common; cost depends on access and part complexity.

Replace faulty EVAP pressure sensor medium
Estimated Cost: $100 - $300

Sensor cost plus diagnostic time.

Replace defective EVAP purge/vent valve medium
Estimated Cost: $150 - $400

Costs vary by vehicle model and valve location.

Repair wiring or connectors in EVAP sensor circuits hard
Estimated Cost: $100 - $400

Complex diagnostics and repair may be needed.

PCM reprogramming per manufacturer TSB easy
Estimated Cost: $0 - $150

Dealer or advanced scan tool required; price varies.

Common Misdiagnoses

Avoid these common diagnostic mistakes:

  • Fuel trim imbalance codes erroneously tied to P00FE
  • Misinterpreting ISO/SAE reserved code statements as actual definition

Frequently Asked Questions

Technical definition of P00FE OBD-II Code

The P00FE code stands for Evaporative (EVAP) System Fuel Tank Vapor Line Restricted/Blocked. This generally indicates an issue with the Fuel System system.

Is it safe to drive with a P00FE code?

With a severity level of medium, may cause check engine light; can affect EVAP monitoring and fuel vapor management but typically does not immediately impair engine running.

What happens when the P00FE code is active?

The most typical signs are: Malfunction Indicator Lamp (MIL)/check engine light illuminated, Potential failed EVAP system monitor, Fuel vapors not properly vented.

Potential causes for OBDII code P00FE

The most common causes are: Clogged or restricted EVAP fuel tank vapor line, Faulty fuel tank pressure sensor or differential pressure sensor, Faulty purge or vent valve in EVAP system.

Repair cost breakdown for P00FE

Expect to pay around $150 if the issue is a PCM reprogramming per manufacturer TSB, but up to $400 if the Repair wiring or connectors in EVAP sensor circuits needs replacement.

Does P00FE affect Ford, Toyota, or Honda?

The P00FE code is a generic powertrain code, meaning it applies to almost all makes and models, such as Honda, Toyota, VW, Ford, and Chevy.

User Comments (0)

Share your experience or ask a question about this code.

Be the first to share your experience with P00FE!