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TuningBot DTC Database · v4.37.15

P04F0 EVAP System High Load Purge Line A Performance

Generic (OBD-II) interpretation + 1 manufacturer-specific in the TuningBot DTC database.

P · PowertrainEmissionsOBD2
Brand pages:Ford

Generic (OBD-II) interpretation

P04F0
EVAP System High Load Purge Line A Performance Generic · emissions Data confidence 65%

The control module judged the EVAP System High Load Purge Line A behaviour implausible for the current operating conditions.

Symptoms

  • MIL illuminated
  • Possible fuel smell in case of larger leaks

Possible causes

  • Loose or faulty fuel filler cap
  • Cracked EVAP hose or line
  • Purge or vent valve fault
  • Fuel tank pressure sensor fault
  • Leak detection pump fault

Recommended checks

  • Check fuel filler cap seating first
  • Read fuel tank pressure sensor values
  • Actuate purge and vent valves and verify response
  • Smoke-test the EVAP system for leaks

Manufacturer-specific interpretations

Ford

1 interpretation
P04F0:92
EVAP System High Load Purge Line "A" Performance Ford · emissions Data confidence 94%

Ford documents P04F0:92 for its 2024-2025 gasoline-engine OBD monitor strategy as evap system high load purge line "a" performance. This three-byte interpretation is application-specific and identifies the detected monitor condition rather than a confirmed failed component.

Recommended checks

  • Perform a full module scan
  • Review freeze-frame and occurrence data
  • Compare commanded and measured values
  • Check applicable OEM service information
Applies to Ford gasoline-engine OBD applications|2024-2025 model years

Related and nearby codes

How to read P04F0

P

Powertrain: engine, transmission and driveline systems.

0

Generic SAE-standard code: same meaning on every make.

4F0

Specific fault index within the subsystem.

Frequently asked questions about P04F0

What does P04F0 mean?

EVAP System High Load Purge Line A Performance. The control module judged the EVAP System High Load Purge Line A behaviour implausible for the current operating conditions.

Is P04F0 generic or manufacturer-specific?

P04F0 exists both as a generic OBD-II code (same meaning on every make) and with 1 manufacturer-specific interpretation(s): Ford. Always read it in the context of your vehicle.

Can TuningBot remove P04F0 at file level?

If the fault logic lives in the ECU calibration, yes: our DTC Removal file service disables the specific fault entry. Checksum correction is not included: it is a separate, optional service. Not sure whether your case qualifies? Request a free assessment and our engineers will check your ECU file.

Other file services

ECU tuningStage 1 dyno results for Ford engines See the results →

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