What does code P04EE mean?

Q: What does code P04EE mean?

EVAP System Very Small Leak Detected - Fuel Tank Side. P04EE indicates that the engine computer has detected a very small evaporative emission (EVAP) system leak, specifically on the fuel tank side of the system. The computer performs a pressure or vacuum decay test and observes a leak rate that is smaller than a large leak but still exceeds the threshold for a very small leak, which is typically equivalent to a pinhole-sized opening.

DTC codes / P04xx · Auxiliary emission controls / P04EE

P04EEEVAP System Very Small Leak Detected - Fuel Tank Side

P04EE indicates that the engine computer has detected a very small evaporative emission (EVAP) system leak, specifically on the fuel tank side of the system. The computer performs a pressure or vacuum decay test and observes a leak rate that is smaller than a large leak but still exceeds the threshold for a very small leak, which is typically equivalent to a pinhole-sized opening.

SystemPowertrain

Code typeGeneric (all makes)

SeverityLow

Fix difficultyIntermediate

AreaAuxiliary emission controls

Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.