Originally published by Vehicle Service Pros, June 22, 2026
In this Tech Tip, Pete Meier with Dorman Training breaks down one of the most overlooked steps in automotive repair: ECM battery coding and ECU initialization after repair. In this video, Meier explains why coding isn’t optional — it’s a must-do for any technician serious about delivering solid, lasting fixes.
When you replace a battery or swap out components like injectors, oxygen sensors or throttle bodies, the vehicle’s computer needs to be updated with new parameters. Skipping the battery replacement ECU reset or the necessary automotive coding and registration process can lead to premature part failure, unresolved DTCs and frustrated customers coming back through your door.
Meier also introduces the Autel MaxiCheck MX900 diagnostic tool, an affordably priced scan tool with over 40 relearn procedures, bi-directional testing and a built-in browser for quick access to service information. Whether you’re running a routine battery swap or a complex repair, the MX900 simplifies the scan tool relearn procedure so you can finish the job right the first time.
Don’t let an incomplete repair undo all your hard work. Watch the full video to learn how proper coding leads to happy cars and satisfied customers.
