Hi and thanks for using 2CarPros. Com.
The misfire can be caused by several things. This is a tough call because a bad o2 sensor can cause ignition problems and ignition problems can cause the o2 sensor to react.
Since you have a code indicating the o2 sensor is bad, I think I would start there. However, they only made these vehicles with four cylinder engines, so I cannot give specific information until I am sure if it is a 1.8L or a 2.0L.
Please provide that information so I can better guide you.
Just so you have an idea on price, here is a break down. Please keep in mind, these are averages. I have no idea what the shop labor rate is where you go or how much they mark up parts. To determine the labor, multiply the hours I have provided by the hourly rate. Also, the parts prices are for original VW parts. Aftermarket parts are much cheaper.
O2 sensor: 210.00
Spark Plugs: 4@ $7.00
O2 sensor parts and labor same as above
Spark plugs: parts and labor same as above
If you are a DYI person, provide the engine size and I will give you directions for checking components as well as how to remove and replace.
Let me know,
Thursday, June 21st, 2018 AT 9:19 PM