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Home >> Volvo >> 2007 >> S40 Base, 2.4 38, Automatic >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Ignition And Engine Control Systems - Specifications, Other (544 Body) >> Vehicle Communication Information, Engine Control Module (ECM) (B5254T3; 2004-2007) >> Description Of Reading Off Extended Diagnostic Trouble Code (DTC) Information (2004) >> Description Of Frozen Values >> Condition, Fuel Trim Bank X:
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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 two 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 error.  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.
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