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P1639 Diagnostic Trouble Code Discussion for March 2018

5-Volt Reference 'B' Circuit Malfunction


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Trouble Ticket Help Requests for DTC P1639
Help Request Posted
2011 Ford F-150 XLT 3.7L Stall VIN: 1FTEX1EM9B
P1639: Vehicle ID Block Corrupted. ... light on and stalling at stops. Codes for one AFR sensor and crank sensor. Replaced both, cleaned throttle body and test drove. Truck seemed ok for a couple days. Engine light never came back on but it does still stall at idle sometimes. I did get the ...
March 01, 2018
2000 Ford F-150 Lariat 5.4L No Start VIN: 2FTRX18L5Y
P1639: PCM VID block corrupted / not programmed. ... shop. Back in April 2017 customer complained about random no start. They found code P0602, they replaced ECM and programmed also replaced ignition switch and programmed both keys. Truck came back to them June 2017 for same concern random no start. They fou...
March 15, 2018