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P1639 Diagnostic Trouble Code Discussion for December 2010

5-Volt Reference 'B' Circuit Malfunction

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Trouble Ticket Help Requests for DTC P1639
Help Request Posted
2007 Lincoln MKZ 3.5L No Start VIN: 3LNHM28TX7
P1639: PCM files corrupted not programmed. ... that a used car lot put a new PCM in and they want me to program it because I have IDS. After programming I get a no crank with a P1639 and P1260. PATS will not program. Did not have the original PCM to pull data out of so had to program axle ratio, tire s...
December 09, 2010