NHTSA Complaint #11462591 — 2021 RAM 1500

April 12, 2022 multiple warning lights ( check engine, electronic throttle, etc. ) appeared, screen warning to get to dealer to service. April 13, 2022 visited local dealer, earliest to service April 20, 2022. April 16, 2022 limp mode, restarted vehicle, restored normal operation with warning lights still showing. April 18, 2022, dealer serviced and stated fixed. April 19, 2022, warning lights and limp mode while driving on highway at 70 MPH. Managed to get to side of road in traffic, waited for break, turned around home. April 20, 2022 vehicle to dealer to repair. Still there as of April 28, 2022. "Star Case" opened. All diagnostics failed to locate problem, now trying various inspections / repairs per FCA technical. Dealer advises they have another similar vehicle ( 2021 Jeep Gladiator Eco Diesel ) with exact same situation so this is not one odd vehicle. Further extent of affected vehicles unknown. Safety issue due to vehicle going into limp mode with no warning, causing difficulty driving in traffic, especially at highway speeds, and risk of accident. Dealer and this owner note that all of this happened right after dealer completed recall for exhaust fluid software system. It appears likely that something done with this recall triggered these problems.