DEF tank head failure. 3 codes on dash, engine light and check engine light. NO warning of when a derate would start, or when an engine shutdown may occur. New part supplied by manufacturer had crystilized DEF on it when recieved at service facility. Suspect supplier may be refurbushing older units, and trying to pass them off as new next generation. Unless and until the manufacturers of these DEF systems can come up with a system that works for 100,000 miles and up, the EPA needs to start to relax the rules on the diesel engine emissions.
- NHTSA ID
- 11418412
- Incident
- May 13, 2021