TSB: Mazda Making Sparks when Charging

Some 2022-2023 Mazda MX-30, 2024-2025 CX-90 PHEV and 2025 CX-70 PHEV vehicles may exhibit sparks when the charging cable is connected or disconnected during AC charging. Removing the charging cable while it is energized can cause sparks because the air’s insulation breaks down. To eliminate the concern, the control logic of the PCM has been modified to temporarily stop AC charging upon a door unlock trigger. Reprogram the PCM with the Mazda Modular Diagnostic System (M-MDS) using Mazda MDARS and clear the DTC. Verify the repair by starting the engine (Ready on) and confirming that there is no check engine light on or other abnormal warning lights. Change the charge connector lock setting in Mazda Connect to either “Locked When Charging” or “Locked When Connected” (select Settings > EV system > Charge Connector Lock).