Chrysler (FCA US LLC) will be recalling certain 2019-2020 RAM 3500. 4500 and 5500 trucks built with 6.7L Cummins high output engines.
According to the safety report filed with the NHTSA, the engine calibration software in these vehicles does not provide adequate engine warm up protection. Inadequate warm-up protection can cause a lack of oil film on the main bearings while the engine is reaching operating temperatures. The engine could become damaged and the connecting rod could fail and puncture the engine block. Oil leaks from the engine block could contact ignition sources within the engine compartment and may result in a fire.
Chrysler will notify owners and ask them to return to their dealers to have the engine calibration software updated to enhance the engine warm up protection. The recall is expected to begin in October. Chrysler's number for this recall is W57 and the NHTSA campaign number is 20V-511.