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It could be a fuse, but check all the links on the comments section. People encounter different solutions to these problems.

www.audiworld.com/forums/q7-mkii-discussion-211/c-compressor-wont-come-3043620/page5/

Thank you for your input! Did that fix your issue?

​​@@mannysolution there are no error codes left. All sorted. 🎉

@@T-programmer thank you for your useful información. I’ll pin the link to the top comments for others to see

No se si tiene el mismo sistema. Por ser diferentes modelos

Was it new or used? Used parts are usually hit or miss.

@@mannysolution new

@@jesusmata9565 a new part should not be leaking.

@@mannysolution i know gotta look under good see where the leaks from,

Was a bolt loose on that rack? Did you have to replace rack again?

Rear blower now fixed! Ice cold in the back too, the air sensor I dont really care about. All I had to do was remove the top trim off the back of the center console, remove 2 screws, get behind the AC controls and splice the purple white wire, I did it the lazy way so I ended up connecting to the exposed wire from my last job so I didnt have to reopen the front trim pieces. Worked like a charm!

According to Audi it’s a variation of the part number or an update on the part.

@@Bresoto it’s different years and models. But they can be coded to your car if you have vag-com vcds. On the description of this video I show how you can coded

@@mannysolution thanks

@@jorgefajardo2213 might have a clogged heater core or clogged radiator. Is the car overheating?

​@@mannysolutionThank you for answering my questions. The heat message came on my cluster so I turned the heater on full blast and also shut the engine off a couple of times untill I drove it home but no more over heat light after that I hope no damage was done . Tomorrow I'll change the pump and the radiator as the next two steps.

Did you tried the wire bypass to the sensor?

I haven’t done it yet, been busy with other cars. But video will come soon, I’ll keep you updated

@@mannysolution I'll give it a try on my own q7 tomorrow and report back. I did the wire to the pressure sensor but will also add the ambient sensor tomorrow. I really need the rear blower to work

Let me know how it goes.

@@gassan16 hey there, any update to this - the bypass worked great, rear blower still showing the same code. :(

@@AhmedBhayat cleaning ECU connections didnt work. I’m sure it’s something inside the cabin. I wired the Pressure sensor and the humidity sensor and those codes are gone, cold AC, but still no rear AC, I looked at the rear ac blower module and it seems to have the same colored cable, so I will soon wire that one to the same spot and see if it works. I believe blower is under center console

Check inside the ECU box these cars are known for having water inside the ECU box. There’s some relays in there that sometimes get corrosion by having water inside for long and would cause all kinds of issues.

Thank you for your input, next time I’ll do that 🙏🏼

I paid around $40 dollars on eBay

@@mannysolution thanks bro I see alot on like for $40 range I called O'Riley and they told me $200+ no mamees lol 🤣 I'ma order it rn I appreciate you bro have a good one padre

No problem bro! I’m here to help

Yes this can cause a leak that you can smell as soon as you open your car. Mine was cracked and it looked like someone had try to repair it before. After replacing this filter no problem.

How kuch was the part I've been having this Q7 it's a good family car ​@@mannysolution

Those are the codes I was having. But after doing this my ac is working except for the rear blowers . I will try to figure out the root of this problem.

⁠@@mannysolution The AC worked the way you described, which is great! However, as you said, the rear blowers are not working. Did you find anything else about this? I will continue to work on it. By the way, one last thing: Audi service asked me for 30 thousand euros for this problem, can you believe it? 😊

⁠it’s crazy so many people are having this issue. I will get to the bottom of it one day😅. 30 thousand it’s ridiculous, glad you could fix it for less 😂

Mine was just leaking fluid through the boots

In my case the ac light was turning on fine. Maybe you’re low on refrigerant

Honestly I haven’t route it through the car yet because I haven’t had any time. I just route it through the door and the fender for now but most likely will have to make a whole some where, but My goal is to find the short and fix it correctly.

@@mannysolution Fixed it - thanks for the video brother!! I also didn't run the wire properly yet, ran it under the bottom engine covers and then under the door sill. Front AC vents are blowing ICE cold but the rears are not working yet still have that rear blower module code and air quality sensor code. For another day... lol.

@@CornerCamTo no problem man! My rear vent are not working either but I’m happy at least I have ac in the front with the hot days we’ve been having lately.

​@@mannysolution Exactly! just happy its working - what I'll be doing next is running a wire from the High pressure sensor to the Air quality sensor - might fix both codes at once. Based on how many people have talked about this looks like a common point of failure.

@@CornerCamTohi bro, did you know find any way to fix the other sensor issue? Thx

Yes bro! I’m so happy right now 😄

I had the same codes but replacing the sensor didn’t fix the issue, my ac still not working.

@@mannysolution ah damn, I found an forum that mentioned it could be a wiring issue from the air quality sensor to the high pressure sensor. I'll try this first, if not might have to drop some money on having a mechanic check it out.

Please post any updates on this video hopefully we can figure it out together I want to help others solve this issue

@@mannysolution Yeah for sure! Will do!

​@@mannysolution Quick update: The new pressure sensor didn't resolve the issue, I also checked the fuses, none were blown. Next, I'll be inspecting the wiring over the next couple of days. If that's not the issue, it might point to a problem with the compressor. I'm really hoping it's not the compressor though. The issue was sudden and random; the error codes timestamp perfectly with the AC failure.

My problem is the compressor is not turning on. I hooked up the scanner and gave me a high pressure sensor fault, I replaced it but didn’t fix the issue.

@@mannysolution oh man. These suvs are lovely but when they give problems, omg

Glad it helped!

Hola Rudy!!

It’s a fuel filter. The electric fuel pump it’s on passenger side, and the other high pressure fuel pump it’s on the engine.

The car has 143k and it was overheating. But the reason for overheating was a head gasket failure , it was in an accident and the person drove the car with a cracked radiator warping the cylinder head.

@@mannysolution ok cuz I’m thinking of replacing my timing chain but they say it’s recommended to change the water pump too…

Yeah, you might as well replace it because in order to get to the timing chain you have to remove the water pump.

May I ask why would you change the timing chain? What mileage do you have? Thanks…

It was losing all the power steering fluid and it was coming out of the boot.

Yes it’s a bit hard to remove but it’s doable.

Yes I removed the top part of the rack and pinion in order to slide it out of the driver side of the car. You can also get an inch or 2 if you loosen the subframe a little bit but not remove the subframe bolts completely, just enough to get more wiggle room.

To my knowledge they have the same mount location , so same procedure and more space for you since you have the 1.8t engine.

Thank you,I’m glad I could help.

Most of the electrical problems this car’s have comes from water getting into the BCM and CCM. The headlight switch and headlights are controlled by the BCM the part I replaced, but you should also check under the carpet (driver side) for water under there. And also under the hood where the ECU lives. Let me know if it helps.

If one side is working and the other is not is not the motor. Might be a broken arm or loose wiper arm.

Thank you