Anyone have any experience in what is needed to correct this intermittent issue I have had on 2 separate days? It misses couple time and throws up code "spn 636 fmi 2 engine pos sensor timing signal err". Last instance it happened I shut it down and took to dealer. They checked it out and code was not in history log, water tested and ran fine. It then ran fine for me for approx 10 engine hours. Sat on lift approx 1 week and did again yesterday.
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