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I just got my F350 back from the dealer. It had the recall work done and they ran a diagnostic test to find the cause for the check engine light coming on the last two times I towed my trailer.
The invoice stated it found "faulty ISP motor replaced and reprogrammed".
My question is what is an ISP motor and what does it do? I'm no mechanic, so sorry if this question sounds dumb. The service writers were no help in answering me and the tech had left for the day. Thanks,Mike