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  • MALFUNCTION INDICATOR LAMP (MIL) - MIL ILLUMINATED WITH DIAGNOSTIC TROUBLE CODE (DTC) P0171 AND/OR P0174 STORED IN MEMORY AT IDLE AND/OR NEUTRAL - LIGHTNING MODELS WITH 5.4L SUPERCHARGED ENGINE ONLY BUILT 3/1/1999 THROUGH 8/1/1999
  • LAMP - MALFUNCTION INDICATOR LAMP (MIL) ILLUMINATED WITH DIAGNOSTIC TROUBLE CODE (DTC) P0171 AND/OR P0174 STORED IN MEMORY AT IDLE AND/OR NEUTRAL - LIGHTNING MODELS WITH 5.4L SUPERCHARGED ENGINE ONLY BUILT 3/1/1999 THROUGH 8/1/1999
Publication Date: AUGUST 22, 2000

FORD:
1999 F-150

ISSUE:

The Malfunction Indicator Lamp (MIL) may illuminate and Diagnostic Trouble Code (DTC) P0171 and/or P0174 may be stored in memory on some vehicles. This condition may occur when the vehicle is at an idle and/or neutral condition particularly at higher altitudes and while using ethanol blended fuel.

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