2006 Audi A4 PCV Valve and Diaphragm Replacement - Check Engine Code P0171
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- Опубліковано 1 жов 2021
- 2006 Audi A4 PCV Valve and Diaphragm Replacement - Check Engine Code P0171: This repair is on a 2006 Audi A4 2.0 Turbo, but other models will be similar. The P0171 code means that a vacuum leak exists near this side of the engine or there is a fuel delivery issue on the first bank of the engine. The first bank or bank 1 is usually located on the same side of the engine that contains cylinder number 1. A lean condition occurs when the engine either receives too little fuel or too much air. As you'll see in this video, trying to remove the oil cap with the car running revealed a very strong vacuum. This was our clue that the PCV valvle needed to be replaced. The entire diagnosis and repair procedure are included in this video.
Here is a link to order the PCV valve and gasket: amzn.to/3ybmke5
**Note: We are giving away a free Mechanic Secrets hat or T-shirt to anyone who can offer a suggestion on how to remove the plastic quick connect fittings that connect the hoses to the diaphragm assembly. The best answer in the comments will win their choice of a hat or t-shirt. We will message you for your choice of hat or t-shirt and size requirements. FYI, this section of the video can be found at 3:14. **
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I like the way you demonstrated engine vacuum before and after. It seems normal function has low enough crankcase vacuum that you won't even notice engine misfires when cap is removed.
Yep I broke both the breather hoses lol as they were brittle. Had to buy a whole new 3 piece pcv valve kit lol. Oh the fun of car issues
You can try carefully heating up the plastic clips so they are a bit more manageable
I appreciate the suggestion but sadly can't report any luck with heating them up. For me, they tend to get deformed rather than soften up any.
Great video! I’m having the same issue
Thanks! Hope it helped.
THE PLASTIC CLIPS - Squeeze the clip at the 12 and 6 o clock positons. This releases the clips at the 9 and 3o clock positions. Zero tools needed, just squeeze wiggle n pull and it will come off by hand. I just changed my PCV and both pipes and nothing broke. 154000 miles. If I can do it any one can. I usually break things, so tend not to try myself, but this was right on top of the engine, so i had to try and im glad I did.
Thank you for this tip. This helped me as well. I believe that this is why many people buy the breather hoses with the PCV valve replacement as a kit, because Audi knows that these things break with age.
You just need to push the 2 flat end in then it slides out
Mine has this code but i have an aftermaket oil catch can, and when i remove the cap its theres so much blow by i feel alot of pressure, any thoughts?
my 06 audi a3 is giving me this code, would i be able to fix the same way?
Having same issue
I have an Audi A6 C6 (british car) with what i think is a broken PCV valve. I attached a piece of hose to it and sucked / blew on it. It held a vacuum and held pressure. Does this mean its faulty?
I am gonna try the oil filler cap bit in the morning to see if its hard to pull off with the engine running
What I do is say a little prayer and tell myself "What would MacGyver do" That always seems the best way ...
Now this is the kind of boots on the ground advice we need around here! I have not tried this technique. You might be a real contender for the t-shirt with this one. You just can't get these important intangibles at tech school, lol. And I, for one, always take it as a great compliment when someone calls me MacGyver.
what aerosol spray are you using to test if there's a leak?
2+2 carb spray. amzn.to/3zRPZ0o
Also it is very important to NOT use brake cleaner, or any other chlorinated solvents, for vacuum leak tests.
I have THIS EXACT SAME
error in an AUDI A3 1.6 8valves 75kw 102cv petrol manual model 8p 2008
Please I mistakenly open my vw passat fsi 2.0t 2008 pcv valve diaphragm cover and the inside assembly components scarted, can you help me with a guide to fix it back as the diaphragm is still in good condition.
I never took one apart before. I don't have much to offer you through the internet. In person maybe I could get it back together for you. Just replace it with a new one. Sometimes the juice is not worth the squeeze.
The part is not that expensive. You should replace it with new if you are not sure where the parts go.
Mine has low compress in cylinder 4 🥺🥺🥺
Close the valves and put compressed air into the cylinders with the engine oil cap off and the throttle body open. If you hear hissing from the engine oil cap, it's piston rings or a hole in the piston. If you hear hissing out the exhaust, it's a bad exhaust valve. And if you hear it in the intake manifold, it's an intake valve. You should also remove the engine valve cover to make sure the cam lobes and rocker arms are ok.
You didn't replace the diaphragm inside the pcv valve yet it's in the title. You wasted my time. Honesty is out the window in the USA. Thanks for nothing.
Buddy the diaphragm is integral to the pcv valve, it’s part of the whole assembly. So yes he did. Chill out
The PCV valve has a diaphragm, yes, but it's one complete part assembled. The diaphragm is not sold separately. Your unhinged comment about everyone in the US indicates that you are simply using this comment to insult people, and nothing more.