VW Jetta revs when hot

Yes, it is a known issue

https://www.google.com/search?q=vw+jetta+2.0+tfsi+rev+hanging

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you have an adjustable throttle cable top & backside of motor.. very easy to adjust back down... my jetty stayed idled too low & would randomly rev until cleaned entire intake & adjusted pin on cable... check engine light went out and it auto cleared code almost immediately

It could be a few things, first need to find out why engine light came on, then address the problems. sounds like ignition related.

when vw started to use the computer controlled gearbox system a criticism was the shift was very harsh,to counter this they made it rev slightly before changing.so that you know the system, try this out....without touching the gas.....put it in d and let the car accelerate to its max speed,stop,then use 1/3rd of gas (keep your foot still)and let it do the same...stop,then,if safe,put your foot to the floor,hard, notice when the car changes gear(revs/speed)then if you drive,only using the first1/3rd of the gas,the cars change pattern will alter to suit.......wierd it is.....

my jetta did same thing. it was vaccumm switch on firewall.

i was a water leak specialist for vw and mainly the leaks are from around the rubber at the windshield as well as follow down through the antenna the 2 fuses under the drivers dash are 45.00 each 20 years ago im sure three more than that now ...use a garden hose and start low and after a few minutes raise it little by little until leak is found as well as a 2nd person in the vehicle with a light to look for the leak you may caulk or of that nature using tape to ensure a nice straight line on the windshield and not make a mess sometimes it even comes from the fenders and so look carefully and raise the hose upwards going slowly allowing the water to penetrate the area in which it finds its way in

try checking the throttle position sensor or the idle control valve both can keep it from running.

Have you checked your transmission fluid?

sounds like a fuel pump issue.

My Pop's 2002 VW TURBO JETTA leaks oil inside exhaust. What possibly could be wrong?