Hi, 2008 Ford F350 diesel with P1633 code. PCM low voltage if the Internet search is correct. I am thinking the fault was created when the PCM fuse was puled mistakenly (and it was) when trouble shooting the cargo light. Cargo light has been out for about a year the code is new. My scan gauge is unable to clear the code even for a moment. So is this a hard code requiring a dealer reset? Will it clear it self with time? Or likely a genuine fault? Battery voltage 12.58 with engine off. No obvious charging issues.
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