OBDMATE OM970 Full System OBD2 Scanner with Transmission

The OM970 is a corded handheld scanner that plugs into the 16-pin OBD2 port under the dash and talks to all of the vehicle's electronic modules, not just the engine computer. That matters on a shifting complaint: a lot of transmission problems set codes in the TCM, ABS or body module that a basic engine-only code reader never sees.

Plug it in, let Auto VIN identify the vehicle, and run a full-system scan. Pull stored and pending codes, then open live data and watch ATF temperature, RPM, wheel speed sensors and battery voltage while you drive or idle. Up to four PIDs can be graphed at once, which is how you catch a speed sensor dropping out or fluid temperature climbing before a TCC or overheat code sets. Clear the codes after the repair and use the one-button I/M readiness check to confirm the monitors are set before an emissions test.

It also runs a battery voltage test and a DLC pin test on the diagnostic connector, which is the first thing to check when a scanner will not link up. Updates load over Wi-Fi or USB-C from a Windows or Mac computer. The 3.5 in. color screen runs off vehicle power, so there is no internal battery to go dead in the toolbox.