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P2799 appear when the e.c.u has been replaced.i didn't how programing ? 4#12.Or 4# 13#

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P2799 can also appear when the e.c.u has been replaced

Vehicle: Toyota yaris 2007 1.5L

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You can not just install a ECU in the vehicle without the  without programming the registration of the VIN, and you would have to perfrom a Automatic transmission initialization when replacing the ECU

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