Front Short Term Fuel Trim, Bank 1

The value indicates the actual compensation factor for the fast part of (fuel trim) .

Measurement range: 0 - 2.

Normal value: 1.

The value is used to increase or reduce the injection time, depending on the deviation, to achieve lambda = 1.

HINT: The control module uses the fast and the slow compensation factors together i.e. total fuel trim is the value of "Front fuel trim fast " multiplied by "Front fuel trim slow".