Transfer Case Mode Switch – Mopar (6zm42dx8ac)

Transfer Case Mode Switch is an electrically controlled component in the engine or transmission management system. Because the module cross-checks it against other inputs, a fault here often surfaces as a code for a different circuit.

Replace the Case Mode Switch when a value freezes or drops out intermittently, which usually means an internal fault rather than wiring. Wiggle-testing the harness while watching live data separates the two.

Reference number for the Case Mode Switch: 6zm42dx8ac. It is filed under Sensors & Switches, and it is the number that has to match the part coming off the vehicle.

This is MOPAR dealer-sourced stock rather than an equivalent, so the number on the Case Mode Switch traces straight back to the manufacturer.