Possible way of fixing codes P0135, P0171, P0300, P0301, P0302, P0303, P0304.

It is simple for those, who know. It may be helpful for everybody else. Video's link below.

My car gave very good example of what I was talking in my videos about money. I would say it is MANDATORY to watch them in order to save hundreds and thousands of dollars(Euros, Rubles, Dinars, Pounds etc).

I have noticed minor misfire, it was on parking or neutral. Check Engine Light came off, so something was wrong.

This is example on my VW Passat B5.5, but similar problem and solution may apply to Jetta, Bug, Polo, Rabbit, Skoda and other cars.

Codes, which you can read if you have scanner or auto part stores do it for free for you:

P0135, P0171, P0300, P0301, P0302, P0303, P0304.

Do not be afraid that you have so many of them, as you will see in this video the reason is just one part and it is doable even if you are not mechanic.

Part number: 06A133528A (or 06A133528D , they are identical application wise).

Money could have spent at dealership:
- $90 (diagnostics of Check Engine Light). Done for free at auto parts store.
- $75 ( part, Vent Check Valve ),
- $100 ( 1 hour of labor ).

Total: about $250.

Saved: $250, but I fought for 3 hrs with original clamps due to luck of proper pliers.

Good luck!