[Alex1990]

I mean a coolant temperature sensor is very cheap circa £10... Lots of tutorials and videos on how to replace it (quite easy), as 73c is very cool considering the temps usually are around 90c.

Hope it helps!

~Alex

 

[Alex1990]

VCDS said G395 sensor - hope it will help! ,

Not going to lie that’s the ac pressure/temp sensor...

Perhaps this link might be of use in trouble shooting, but bear in mind the diagrams are for the 4G model so the Audi A6 2011-2018

00256 - A/C Pressure/Temperature Sensor (G395)

Evening Folks, I’m about to go order a new G395 sensor to hopefully resolve the error on module 09. It looks to me that whatever those errors on module 8 are, they might also be resolved by replacing the faulty sensor on module 9. However, do you think the error in module 28 may also be due to...

forums.ross-tech.com

It’s worth a read! Otherwise might have to go to the car garage to look into further.

~Alex

 

[Alex1990]

Another link on replacement sensor if it is the case: Air con pressure sensor G395 replacement

👍🏻
~Alex

 

[Alex1990]

Let us know if it resolved your issue!

~Alex

 

[Alex1990]

Then I wonder you know if you turn your AC on does the fan spool up?

does it the A/C gas need to be emptied and renewed / fill up?

also to consider the relay perhaps ... hmm lots to think about when trouble shooting

otherwise there are quite a lot linked with that fault code.

see if any of the above perhaps?

~Alex

 

[Alex1990]

The coolant temp sensor replaced - did not help

Checked relays - all looks ok

Checked connecter next to brake fluid reservoir - looks ok

Fan control module and connector left...

Do you have a generic code reader or a VCDS?
Because VCDS or OBDeleven (works only with android) will give you a specific fault codes, rather than you throwing parts at it!

With the specific code you could trouble shoot a lot better to be honest!

also either low AC refrigerant or needing to replace the fan see thread:

Radiator Fan Control Module - AudiWorld Forums

A8 / S8 (D3 Platform) Discussion - Radiator Fan Control Module - Guys I think I may have a bad Radiator Fan Control Module Yesterday after coming home and starting up the car to go to the gym I notice that the fan was running on high, and the car was ice cold, so I turned off the Ignition and...

www.audiworld.com

~Alex

 

[Alex1990]

I do - VCDS.

It says P0481-004

Might’ve found another good one for you to look into by the way!

2009 S5 Cooling Fan Running Non-Stop - Draining Battery

EDIT: Current status of this issue: CLOSED - Broken/corroded wire within harness. See below. PS: I hope this helps serve as sort of a diagnostic procedure as well as reveal a potential issue with this platform. I lack the appropriate wiring diagrams, so my experience is just to reach out to the...

www.a5oc.com

Does this sound about right??

Very similar situation!

~Alex