Condition, fuel trim bank X:

Fuel trim can assume 5 different conditions:

1. no fuel trim, the start conditions have not been met.  .

   This condition occurs at the crank or immediately after start before fuel trim has started

2. fuel trim with 2 probes  .

   This situation occurs during driving when both probes are used during fuel trim (part load).

3. no fuel trim, operation with predefined values  .

   This situation occurs during hard acceleration or during fuel shut-off when there is no fuel trim and operation is under predefined values.

4. no fuel trim, operation with system fault  .

   This situation occurs when an earlier diagnostic trouble code (DTC) was stored that caused the fuel trim to be disabled

5. fuel trim with one probe (front)  .

   This situation occurs at idling speed or during light acceleration when one probe (front) is used during fuel trim.