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P1639 Diagnostic Trouble Code Discussion for June 2010

5-Volt Reference 'B' Circuit Malfunction

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Trouble Ticket Help Requests for DTC P1639
Help Request Posted
2001 Ford E-150 Econoline 4.2L MIL Lamp on VIN: 1FTRE14231
P1639: VID Block. ... I'm not a tech at all, I do auto motive locksmithing, this was a friends van I'm trying to help him out. I may be totally out in left field and have no problem if someone here lets me know. The van in question has 350,000 miles and is due for smog inspecti...
June 09, 2010