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P04B5 on the 2014 Ford C-max

The bulletins listed name this code in NHTSA's summary, or are about the same components. A bulletin or a recall listed here may apply to the model year. None of it is a diagnosis.

Nobody has written a description of this code yet.

Bulletins for this model year that name P04B5
SSM 477652019-03-04. Service bulletin. Some 2013-2018 C-MAX, 2013-2019 Fusion Energi, and 2017-2019 Fusion/MKZ Hybrid vehicles may exhibit an illuminated MIL with diagnostic trouble code (DTC) P04B5. This may be due to inadvertent actuation of the fuel door release button by the customer when exiting the vehicle. If the fuel filler door is not fully closed after a refueling event or the fuel filler door is open from erroneously pressing the fuel door release button, a message displays during the third drive cycle to indicate the fuel filler door is not closed and the DTC sets. Before performing Workshop Manual (WSM) diagnosis, consult the customer about the potential for accidental fuel door actuation and explain the need to fully latch the fuel door after every refueling event. Malfunction Indicator Lamp will turn off after (3) drive cycles with fuel filler door closed.
SSM 464542017-05-22. Service bulletin. SOME 2013-2017 C-MAX/FUSION ENERGI AND 2017 C-MAX/FUSION/MKZ HYBRID VEHICLES MAY EXHIBIT AN ILLUMINATED MIL WITH DIAGNOSTIC TROUBLE CODE (DTC) P04B5. THIS MAY BE DUE TO INADVERTENT ACTUATION OF THE FUEL DOOR RELEASE BUTTON BY THE CUSTOMER WHEN EXITING THE VEHICLE. IF THE FUEL FILLER DOOR IS NOT FULLY CLOSED AFTER A REFUELING EVENT, OR THE FUEL FILLER DOOR IS OPEN FROM ERRONEOUSLY PRESSING THE FUEL DOOR RELEASE BUTTON, A MESSAGE DISPLAYS DURING THE THIRD DRIVE CYCLE TO INDICATE THE FUEL FILLER DOOR IS NOT CLOSED AND THE DTC SETS. BEFORE PERFORMING WORKSHOP MANUAL DIAGNOSTICS, CONSULT THE CUSTOMER ABOUT THE POTENTIAL FOR ACCIDENTAL FUEL DOOR ACTUATION AND EXPLAIN THE NEED TO FULLY LATCH THE FUEL DOOR AFTER EVERY REFUELING EVENT.

2 on file from NHTSA, as of 2026-10-19. See them in the bulletin list. A bulletin lists model years: read the document for which vehicles it concerns.