P05A0 on the 2021 Mazda Mazda3
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.
| 09-048-22 | 2023-01-05. Service bulletin. Some vehicles may exhibit the following symptoms with DTC P05A0:00 (Active air shutter and the opening angle abnormality (sticking)) stored in memory. Symptom 1 [Mazda3 and CX-30]: The active air shutter is working, but DTC P05A0:00 is stored in memory. Cause 1: This is caused by improper control software of the PCM detecting the DTC immediately without performing the failsafe operation. When the active air shutter detects unusual torque, it is designed to repeat the open/close cycles up to three times as a failsafe to try to remove the object(s) which temporarily disturbed the movement. Symptom 2 [Mazda3, CX-30 and MX-30]: The active air shutter is frozen by snow and/or ice under freezing temperatures with DTC P05A0:00 stored in memory. Cause 2 [Mazda3 and CX-30]: When a temporary blocking of the active air shutter is expected to be caused by snow and/or ice and the intake air temperature is above the freezing point, DTC P05A0:00 may be unintentionally detected. [MX-30]: When a temporary blocking of the active air shutter is expected to be caused by snow and/or ice and the heater is turned on, DTC P05A0:00 may be unintentionally detected |
|---|---|
| 01-009-21-3799 | 2021-04-26. Service bulletin. Some vehicles may exhibit that the active air shutter is working, but DTC P05A0:00 (Active air shutter: Opening angle abnormality (sticking)) is stored in memory. This is caused by improper control software of the PCM detecting the DTC immediately without performing the failsafe operation. When the active air shutter detects unusual torque, it is designed to repeat the open/close cycles up to three times as a failsafe to try to remove the objects which temporarily disturbed the movement. To correct this concern, the control software of the PCM has been modified. |
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.