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TuningBot DTC Database · v4.38.5

P04EB EVAP System Small Leak Detected - Fresh Air Side

Generic (OBD-II) interpretation in the TuningBot DTC database.

P · PowertrainEmissionsOBD2

What P04EB means

P04EB
EVAP System Small Leak Detected - Fresh Air Side Generic · emissions Data confidence 65%

The control module detected a leak in the EVAP System Small during the system leak monitor.

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

Related and nearby codes

How to read P04EB

P

Powertrain: engine, transmission and driveline systems.

0

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

4EB

Specific fault index within the subsystem.

Frequently asked questions about P04EB

What does P04EB mean?

EVAP System Small Leak Detected - Fresh Air Side. The control module detected a leak in the EVAP System Small during the system leak monitor.

Is P04EB generic or manufacturer-specific?

P04EB is a generic OBD-II code: it has the same meaning on every make and model that follows the SAE standard.

Can TuningBot remove P04EB 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 tuningDyno-tested results by model and engine See the results →

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