i have a customer that has code p0725 and p1780 on 2001 Volkswagen Jetta

the car runs for 15 - 20 min and then goes in to limp mode it is an automatic trans and p1780 per tech bullitens seems to be non helpful . p0725 indicates speed sensor ? on cost and time and there seem to be 2 speed sensors any way to narrow down cusotomer is 120 miles away?
thanks chuck

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