2013 AUDI A6 NO A/C DIAG & FIX 

This was the absolute best video out there on this specific issue. Thanks. Great job!

Very nice diagnosis. Helpful info and you're right, this community is priceless. Thanks Mario!

Thank you for being so thorough. I wish nothing but the best! Keep up the great work 🍾🏎️

Thank you my brother had this issue and this was the first video I watched for this same vehicle and it worked thank you Great job...

Thanks for this video, I didn't have access to any of the tools you used, but as it was the cheapest and easiest part to replace to fix my C7 A6 A/C issue, I rolled the dice and swapped out the pressure sensor. It worked like a charm!

I own one of these and this made me feel like it could be straight forward dealing with upcoming issues! Thanks Bro, btw about to start binge watching your videos!

Great stuff Mario. I never figured out how to diagnose those a/c system. Never found good information. I tried to simulate it with my sensor simulator but no luck. This was great help & great information. Thank Mario for helping us and showing the normal data.

Another great video, Mario! I got kinda nervous when you called the condenser so soon. Glad it all worked out in the end, tho!

Thank you Mario! Great job on that Diagnosis. I need to get me that scope!

Great skills, great video, great work got job well done, Mario. I wish I would live around your area. Thanks.

Awesome vid dude, Im working on the same issue with my A4

Great useful info Mario 👏. Loved the video, very detailed.

My AC has never blown as cold as it does now although that may stem from satisfaction of fixing it myself. Thank you for this video

Just needed confirmation on ease of removal and installation of pressure valve. All diagnosis equipment is wonderful if you are a shop but wing nuts like I just need to be sure there are no other trip ups in the removal and install. Thanks for showing it all.

Great vid. I recently had a Matrix with a system like that. Compressor has no clutch. Runs all the time. The solenoid valve turns the thing on hydraulically and away we go. Nice to c the PWM signal to the compressor from ECM or Hvac, whichever. I think ECM. Really interesting was sensor in the hiside tube was communicating with info packets. So it’s a little module. Our cars today have so many of these little modules that were gonna have to name them like kids. I think that Audi has about 25 kids. The fix on the Matrix was a reman compressor. The drive in the front had gone “hasta la vista”. Remember the old Westerns where the good guy had two six guns holstered and ready? That’s Mario with his scope, scan tool and red beeping gizmo.

Appreciate the videos, good stuff, I never thought I could trouble shoot my canbus and all with my electronics oscilloscope.. those were clean waveforms .. 🍻

Excellent video with the explanation of the scope data...

The Power Probe IV is a good start but the scope is still king. Nice call on the sensor and I appreciate the explanation of your approach. I lived in Daytona Beach for 12 years but I had to get out of the constant heat. :)

Very good Mario. Also well presented . My A6 ax/ air not working after mechanic put in new motor and control unit . Thanks Mario

Nice... I'm still new to AC. Will keep this video in mind!

clean and efficient. YOU ARE THEE MAN. Thanks bro.

Good job brotha, thanks for the info.

Well explained bud. Keep at it you're quite good so stick with it.

That was a beautiful diagnosis

Yo this help a lot have 2 car with similar issues where not cooling at all system have pressure but won’t cool Audi an vw

Great video, thank you for the help

Great video man. Did similar troubleshooting with the error pressure sensor, fixed that. But the AC compressor still isnt turning on?

Damn, this was a wonderfully detailed video. Great work man.

Great video man thanks, having the same issue with 13 3.0T. Going to swap that out and see if that’s it.

Great vid buddy 👍

Mario eres la verdura del caldo wey muy buen diagnostico gracias por el video

Thanks again for a super helpful and technical video. You have such a deep understanding of these modern car electrics, it is hugely impressive. Thanks for sharing Mario.

Sweeeeeeeet video and diagnosis. I’m about to work on a bmw tomorrow that’s coming from another shop. Ac issue

Nice work

Hey mario, have a question... I had The high side pressure temperature sensor trouble code... I also had error on my Scan Tool... I replaced the sensor and the trouble codes never came back.. thx god, But the Ac Compressor did not come on.. I went to basic settings and I cleared them.. is it possible that I could’ve messed up by doing that?? Thx for the video. I’m stuck ........

I'm learning from you, thanks

what program do you use for the ac diagrams, very good video by the way.

SUBSTANTIAL Super Mario Diagnostics Brilliant 🎶 🎵 👌 Great tutorial Good video thank you very much for sharing with us. Super Mario Diagnostics From Nick Ayivor from London England UK 🇬🇧

I have an audi A5 3.0tdi 09 plate withan aircon issue. Its been in and out of garages who are unsure what it is or too scared of the work it may involve. Everything mechanically has been checked and or replaced (a tool was connected to the commpressor sending the correct signal through and it worked peefectly blowing ice cold air out) the only fault code is "implausible signal AC" "00898". The pressure sensor hss been checked and replaced, commpressor replaced, ac head unit replaced. Any other ideas what could be wrong with it?

Liked and Subscribed! Awesome video. Is the sensor in this case sensing the low side, or the high side? After repair it was reading 127psi. I am a home gamer, and I've been fighting with no AC on my 2008 A6. The most I was able to fill low side to, was about 63psi on manifold gauge. I was unable to get compressor to cycle on while filling. The only error I got through VCDS scanning was refrigerant pressure too high. I was able to get compressor to cycle on by previously applying compressed air to center port on manifold. It was about 30-50 psi higher than the low side. I was also able to get compressor to cycle on using a duty cycle test in VCDS. The off code for compressor was 1. (Refrigeration pressure too high). I'd clear this code, and try again, until I gave up and decided to research more. Seems difficult just to get information. Do I need to get a module tool to cycle compressor on, just to fill system, or test compressors ability to function, without car interfering? Sry long post.

great job.thanks

Would the ac blow hot before and sorta warm? Or was it not blowing at all?

Great video .. So there was LIN communication between sensor & control unit, which was correct, but sensor was bad ... The pressure regulator gets pwm from control unit..

I am from Malaysia Kuala lumpur My Q5 also have a troubleshooting about NO A/C at all but at the certain time he will on the A/C its only up to him eventhough the control unit still on. Is there any other place i can diagnose and fix exatcly as you video. Thank you

Great audio! 😄

Good job

Wow, even individual sensors communicate on the bus. I wish there was a way to recognize bus signals that come from the component you're interested in. As it is, the scope sees all the chatter.

Hi I have 2006 audi q7 3.0tdi ac not working check with VCDS software for audi and not showing any errors I changed evaporator temperature sensor and going to change other sensors as well.i don't know what I am doing is correct or not please help me Thanks

Cool info! How’s that micsig working out for you? Do you use it for anything specific over a pico??

I did not know the power to the clutch was PWM. Is that to control compressor speed irrelevant of engine speed? Thanks for sharing.

the autel is a fantastic scanner. much better than snap on in my opinion.

Is 55*F vent temp normal for a 100 degree day in FL? I'm used to seeing mid to low 40s in Texas. The reason I'm asking is I'm working on a 2010 focus that will not get below about 55 vent temp. Pressures look ok for 100*F ambient. 230 ish on the high side, and about 40 on the low. It came in with a dead compressor and a leaking evaporator core. We sold the whole kit with expansion valve and dryer, as well as the leaking evaporator. Afterwards, pressures look ok, but inadequate cooling. Any ideas? Any related experience with this vintage focus? Thanks Mario. Great videos

Hi! My ac compressor is not getting any power. Blows hot air , they are saying my electric system Modular needs to be replaced panel d . Is this accurate?

What type of tester are you using

My nephew has a 2018 Audi Q3 and the AC blows cold air but then when he stops at a light it gets hot and then turns off. Any ideas what it could be ?

Great video my brother Please Help 2006 audi a8 4.2 When the a/c is turned on, hot air blows out of the vents for 5 minutes after which cool air then begins to blow out of the vents. I used ac Gauges to see when ac compressor working . it take 6 minutes .after that it Blowing ice cold. When ac compressor working the high side 170 ​low side 37psi I changed the AC compressor solenoid to a new one but the problem is still. The freon level was fine No Fault Codes Thank you

Great stuff! I'm still wondering why bar is used in any industry since it's not a si unit of measure. Like how is 14.7 psi to 1 bar useful. Lol looking forward to your next video! 👍

Thank you dear

Hi Mario, I have the same A6 in India, I have issues with AC. Sometimes ac compressor is not getting engaged. We changed pressure sensor switch and now error shows that it's faulty humidity sensor. Another static message is "Function limitation due to missing error message" Fault code uc111100. My mechanic says to change the compressor, is that the solution? Please advise

I have problems the ac compressor does not activate the 2 connector cables have ground

Hey bro thanks for the video!! I have a 2014 Audi A6 that I need to change that same sensor and I read that I would have to take off the front number to reach the sensor, how true is that? Am I able to just open good and reach it a bit more simple than taking off the bumper?

thank you for this helping video and I want to ask about micsig oscilloscope is it good device to buy

Hey, there. I own a 2014 Audi A6. I have a code. Which is B11AF07. Don’t know where the fresh air door motor is located at. Any info on that?

No tiene corriente mi compresor y no prende el ventilador cuando enciendo el ac y abeses se queda prendido un ventilador por un rato después de apagar el auto es un Audi A4 2010 el fan modul tendría que ver con eso ?? Ya cambié el sensor de presión

where did you get your test leads for your scope? i ordered the same scope and the ones they come with are garbage. the distance between the positive side and negative isnt long enough to make it useful. good work mario

Great work sir :) . Is this A6 2013 Hybrid ?

I hate going off topic but I have this car and an as yet unsolved problem. If the car is in D and from a brake pedal stop is allowed to 1- creep forward at all without pressing accelerator Or 2- sit without the accelerator being pressed for a time span of maybe 1.5 secs When you press the gas the transmission slips like it’s ruined- won’t move vehicle- high revs etc. However if you move your foot immediately from holding brake to accelerator the car takes off without any slip every time. Is this some faulty rollback function or hold on hill or creep control software problem? Has anyone heard of this 2013 a6?

U111300 Function Limitation Due To Received Malfunction Value Can u help with this ? AUDI A6 2012.

Hey brother, thanks for the information. But I have an issue, hoping you could help me out. So I have an Audi just like the one here I went to change the sensor and realized the valve core was leaking air. Could that maybe Be an issue and trigger the sensor and if so would Could I change it out or is there a certain way to do it?

Which scope should u choose between autel and ur scope? Thank u

Hi man. I have an A4 TDI with the same problem! Today when i change the sensor the new one start to leak gas, for that reason i pass the max turn and i broken de aluminium part tube. What can i do to repair? Please help

What is the part called? Cheers

Like this video thanks .

Gracias Mario. I am having a similar issue with my 2008 Audi a6 Avant and everything points to the pressure switch. A dear friend of mine who is a fantastic mechanic hooked the gauges to both high and low pressure and there is plenty of Freon. Too bad I don't have a vag com.

I have the same issue on my A5, I replaced the sensor yet I don't have possitive pulse to the compressor any suggestions?

Can u save wave forms on that scope?

I have the same problem with my car I took to the mechanic and he didn’t fixed it he replace the hight pressure valve the compresor the others part condenser and fans and still doesn’t work I don’t want to take my car back I have to paid more for it and not fixe it

Are you located in weston?

Nice good sir my name mi macnic a.c from india

Entonces cuál fue el problema solo el such

That's a rapid diagnostic

I need you in Dubai