Remove the fuel tank unit.
Remove the fuel level sensor (fuel sending unit) (A) from the fuel tank unit (B).

Check these items before installing the fuel tank unit:
When connecting the wire harness, make sure the connection is secure and the connector (C) is firmly locked into place.
When installing the fuel gauge sending unit, make sure the connection is secure. Be careful not to bend or twist it excessively.
Install the parts in the reverse order of removal. When installing the fuel tank unit, align the marks on the unit and the fuel tank.
Honda Fit 2007-2026 Navigation Online Reference Manual
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Fuel and Emissions System Description - Electronic Throttle Control System
Electronic Throttle Control System
The throttle is electronically controlled by the electronic throttle
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Adding Engine Oil
Unscrew and remove the engine oil fill cap on the valve cover. Pour in the oil
slowly and carefully so you do not spill any. Clean up any spills immediately. Spilled
oil could damage components ...