After a service visit a few months ago, they updated the bikes firmware. Now, error code p0151h illuminates the check engine light--there are no other codes present. It's happened 3 times in 3 months. I do have a stage 1 with Rineharts, tuned on local dealers dyno. I clearly remember that p0151h would not light up the check engine light by itself, if it was the only code present. Anybody know if there is a later update that keeps the old p0151h "silent", like it used to be? I plan on bringing it in next week when I get a chance. Bike is running great, it is a 2018 Heritage Classic.

 

 

 

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Picked up bike this morning, dealer says rear oxygen sensor replaced with one they had to take off a new bike, as Harley and nearby dealers were out of stock. They re-tuned on their dyno, and I can tell the rear-most muffler was moved slightly forward and now meets exactly where the header heat shield stops (there was a tiny gap before), although they said nothing about this. All seems well so far, but I will have to ride it for a longer time and take a more distant trip to be sure. Nobody there knew whether or not the p0151h code by itself used to not light the check engine light in the past.