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Had a real bad week with a fleet of 2020 Freightliner Cascadias
Three trucks came in from the same company in Boise with the same DEF system fault code, P20EE. The first one took me a full day to trace back to a cracked injector line, but the other two had clogged dosing pumps. The shop owner said the company switched to a cheap off-brand DEF fluid six months ago. Has anyone else seen a rash of issues from a bad batch of fluid?
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jessicap826mo ago
Cheap DEF will wreck those dosing pumps every time.
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susan816mo ago
Actually, @jessicap82, I've had decent luck with the budget stuff in my old truck. The pump's been fine for years now. Maybe it's more about the specific brand than just the price.
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emma_rodriguez304mo ago
Oh man, I feel you on this one! My old F-150 has been running on the cheap stuff for like three years now and the pump's still going strong. I think it really does come down to which brand you grab sometimes. I've had a few bottles from the gas station that made my truck act up a bit, but the stuff from the farm supply store has been golden. So I get it - not all budget options are junk, you just gotta find the right ones.
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