Dodge Ram 2500 transfers case shifts into low range unexpectedly with no key in ignition on Dodge Ram 2500

Some Dodge Ram 2500 owners report experiencing unexpected shifts into low range even when the key is not in the ignition. This issue may stem from a malfunction in the electronically controlled shift system of the transfer case. Additionally, operating the vehicle for an extended period in 4HI mode on a dry surface could create driveline torque load, contributing to this problem. Owners have also identified potential causes such as loose TIPM connectors, a faulty AC pressure switch, chafed wiring, or issues with the transfer case mode sensor and shift motor. Furthermore, moisture in the shift motor may lead to these unexpected shifts, and cleaning the contacts could be a preliminary repair step. It is recommended that affected owners consult with a certified mechanic or dealership for proper diagnosis and resolution of the issue.