One problem related to transmission solenoid has been reported for the 2010 Volkswagen Jetta. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2010 Volkswagen Jetta based on all problems reported for the 2010 Jetta.
My 2010 vw Jetta sportwagen got the glow plug light intermittent flash starting on 72k miles. In the cold morning I could drive 10-15 minutes without issue. However, once the glow plug is on, it could not exceed 40mph. Here's the diagnostic from the dealership: 72017 confirm mile on, glow plug light intermittent flash. Perform guided fault finding, faults tored p00af. Turbocharger boost performance visual inspection found vacuum hoses good. Following test plan, check n75 solenoid good. Check wiring to g581 ref volt good. Perform gff function test vacuum diaphram good. Function test n75 good. Vacuum at 9psi. Check internal resistance at boost actuator position sensor out of spec. Rec replace g581 charge pressure actuator position sensor (within turbo assembly). . . Parts will need to be special ordered $1,444. 41 + tax. . .