NHTSA Complaint #11529554 — 2020 RAM 3500

My check engine light went on, along with the DEF warning, early June 13th,2023. The DEF warning stated I had 150 miles to get the Track to a Dealer. After Dealer evaluation, I was told the truck had DEF contamination, from ,Diesel Fuel. I asked how this could happen? I was not given an explanation. To me this is a DEF Pump failure. The DEF Pump did not have enough PSI to inject DEF into the Diesel Fuel, so the Diesel Fuel back flowed into the DEF system. Additional facts, my Truck warranty expired 5/15/2023. My truck has less than 36,000 miles. I had the High Pressure Fuel pump, Recalled fixed in May 2023. I was told this repair did not lead to this issue. The Repair bill is over $3700 for this repair.