02 VW Jetta GLS Sedan 1.8 turbo gas w/ tiptronic 5 spd auto trans…. Had OBD codes of 411 and 171.. put on new MAF, SAI Pump, New fuel pump, fuel filter and codes 171 & 411 gone but CEL came back on and Auto zone says it is OBD Code 1780…something about ECM & TCM not communicating. Do you think that flashing the ECM might correct this or what is you thoughts on fixing the problem causing the 1780 code.
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