I have 94 f150. I did my own diagnostic and came up with a code of 539. I have been looking on the e-net for hours for a list of codes and can't find any codes before 1997. The code I come up with has no letters. What the hell. Please help.


Asked by Jan 25, 2015 at 08:58 PM about the 1994 Ford F-150 XLT 4WD Extended Cab SB

Question type: Maintenance & Repair

1 Answer


I have a list of OBD-1 codes which list # 539 "Air Conditioning on during self-test." There is no listing for a 539 code for OBD-II systems.

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