P0AA9 on the 2018 Mitsubishi Outlander
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.
| SC18001 | 2018-11-19. Service bulletin. This is a Service Campaign Bulletin sent to dealers. This bulletin supersedes TSB-18-54-005, issued July, 2018. The bulletin informs dealers that updated software for the sub-BMU was released to address the additional DTC P0AA9 (Leak Sensor Detection Circuit.) The bulletin also revises the production date of affected vehicles, software, data and warranty information. |
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1 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.