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TuningBot DTC Database · v4.37.15

P0457 Evaporative emission (EVAP) system - leak detected (filler cap loose/off)

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

P · PowertrainEmissionsOBD2
Brand pages:Ford

Generic (OBD-II) interpretation

P0457
Evaporative emission (EVAP) system - leak detected (filler cap loose/off) Generic · emissions Data confidence 78%

The control module detected a leak in the Evaporative emission (EVAP) system during the system leak monitor.

Symptoms

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

Possible causes

  • Mechanical fault
  • hose connection(s)
  • EVAP pressure sensor

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
P0457:00
EVAP System Leak Detected (fuel cap loose/off) Ford · emissions Data confidence 94%

Ford documents P0457:00 (no sub type information) for its 2024-2025 gasoline-engine OBD monitor strategy as evap system leak detected (fuel cap loose/off). 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

P04 range
P0400P0401P0402P0403P0404P0405P0406P0407P0408P0409P040AP040BP040CP040DP040EP040FP0410P0411

How to read P0457

P

Powertrain: engine, transmission and driveline systems.

0

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

457

Specific fault index within the subsystem.

Frequently asked questions about P0457

What does P0457 mean?

Evaporative emission (EVAP) system - leak detected (filler cap loose/off). The control module detected a leak in the Evaporative emission (EVAP) system during the system leak monitor.

Is P0457 generic or manufacturer-specific?

P0457 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 P0457 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

Stage 1/2/3 TuningDPF RemovalEGR RemovalAdBlue / SCR RemovalDTC RemovalIMMO OFFSpeed Limiter (Vmax)

Understand the system behind this code: EVAP System

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

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