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TSB
05-22-6
  • MIL ON WITH DTC P1131 AND/OR P1151 - 4.2L ENGINE
Publication Date: October 21, 2005

FORD:
2001-2003 E-150, E-250
2001-2004 F-150

This article supersedes TSB 05-17-3 to update the vehicle model years and issue.

ISSUE:

Some 2001-2003 F-150, 2004 F-150 Heritage and 2001-2003 E-150/250 vehicles equipped with a 4.2L engine may exhibit the malfunction indicator lamp (MIL) on with diagnostic trouble codes (DTCs) P1131 and/or P1151 (system too lean bank 1 or 2). This condition may be due to leaking isolator bolts/port gaskets in the upper-to-lower intake manifold mounting area. This condition is sometimes intermittent and may not be apparent on a warmed-up engine.

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