Trouble code P0811 means: Excessive clutch slippage
The 2003 Volkswagon Jetta OBD 2 port is "in cavity at bottom of dash, between steering column & kick panel"
replace spark plugs @wires
Trouble code P0501 means: Vehicle Speed Sensor A Range/Performance
The 2002 Volkswagon Jetta OBD 2 port is under dash at left side
I have the same code on my 2003 accord.
The 2003 Dodge Grand Caravan OBD 2 port is on lower edge of dash above parking brake pedal
The OBD II connector is what your looking for on Jetta III models remove the ash tray then slide the pannel to the right of the ash tray over the ash tray opening.
it is number 2
You need a factory scantool or aftermarket scanner that will read transmission codes. A basic obd code reader at parts stores will not read transmission codes.
What does obd code P0740 mean
You need to rent / borrow / purchase an OBD II code reader to check the code.
Trouble code P2100 means: Throttle Actuator Control Motor Circuit/Open