Gets to about 3.5 mph and will not go any higher.shuts off above 4 mph

https://www.bikefolded.com/swagtron-swagger-folding-electric-scooter-review/

Quoting from link above: "The scooter features 5 gears with the maximum speed of 5 mph for gear 1, 7.5 mph for gear 2, 10 mph for gear 3, 12.5 mph for gear 4, and 15 mph for gear 5."

If you google search it you will find which one it is.

After the MIL is turned off or the battery was disconnected for some time, all monitors are set to incomplete. However with several short trips with engine getting at least to hot enough for thermostat to open, (I believe 8 is the magic number of trips) most monitors are set, you may be able to pass the test with only one incomplete only.

Make sure horn unit is grounded properly

please RUN the software calibration for diagnose, troubleshooting and fix it. You have a speed sensor bad adjust it. clean it and tigh the wires connector very well. b) LUBE the shaft and gear from elevation motor c) adjust the pot.
God bless you

You use premium gas in a TDI? Run that by me again? A TDI is a diesel engine car. What don't I understand here? I'm not being a smart __s but this just does not make sense. If you have put gasoline in a TDI, DO NOT DRIVE IT. Tow it to a dealer.

Hi, my first recommendation would be to take the plugs out and visually inspect each one and check to make sure they are properly gapped, if they look fouled at all i would replace them without hesitation. try throwing a set of NGK plugs in the car to fix the misfires. other than that you may want to look at the wires. good luck joe

Have the dealer tech run it through pot holes as well This may resolve your problem. Stablizer bushings maybe worn?

havent a clue here ,one cylinder now another missing ,only one thing comes to mind here and thats the coil pack ,check the voltage across the battery with engine running at 1500rpm and if its higher than 15.5 volts of their abouts then the alternator regulator is playing up and this would cause problems with the coil pack or the ECU ,also the radio could blow and lots of bulbs.Other that this i would need to get my greasy hands on it and give the magic hammer treatment

First I need to ask is it a 4 speed or a 3 speed transmission. If it's a 4 speed when driving down the road pull it from drive to third gear. You shpuld hear the engine speed up if it does not then that means you have on 4th gear and you will have to take it to a transmission shop. If it's a 3 speed then just count the shift points if all 3 gears are present then drive down the road and see if the van goes into tcc. When you mean the rpms are high how high are they.