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International Automotive Technicians Network
Re: Jeep 9 speed transmission
Posted to Technical Discussion Forum on 8/27/2021

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G'day Larry, U0402 basically means that the ECM can't decipher info sent by the TCM. I'm currently repairing a 2015 Mazda BT50 with a U0401 set in the TCM (not the ECU), the difference between the tw... Login to read more.