My uncle has a 2019 Paccar MX-13 that always seems to trip the same trouble code. I can get the exact code, but it's something like a def heater line circuit fault. He replaced the def heater line and it still comes on. His next move is to look at the harness. Any other ideas on what to check? Lol…My solution was that he should've bought a gilder to start with.
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2019 KW T680 Paccar
