The H9 error code relates to the thermistor that measures outside ambient air temperature. The system relies on this reading to operate efficiently across different weather conditions, and an H9 fault can appear when the reading it’s getting is invalid.
This is generally an isolated sensor or wiring issue rather than a sign of a broader system problem.
Send us the code and a photo of the display, and a Ford & Doonan technician will get back to you. Please don't reset the unit before you take the photo.
(08) 9331 8800