VAG help

zeeeebo

zeeeebo

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ok so this message came up on a scan ( my temp gauge has been playing up ( hardly ever goes to 90degrees))

photo.php


so i spent 20quid and got a new temp sensor fitted it all and my temp still isnt running up to 90degrees! is there a second remp sensor?
 
wouldnt that say thermostat instead of temp sensor though on the reading?
 
nope... implausible signals are fairly common, usually don't come back once cleared and clear themselves after a while IIRC... prob just a dodgy connection on the plug...

http://wiki.ross-tech.com/index.php/16500/P0116/000278

If the temp gauge needle moves around a lot giving all sorts of readings then this typically suggests the sender is ********... if the temp sits at a constant temp that is less than 90 degrees, this suggests the thermostat is ********...

Both faults are very common and pretty cheap to sort...

<tuffty/>
 
yer gives many readings! sometimes 60 sometimes 70 80 90
al over the shop lol
 
If you've changed the temp sensor, and you're still getting Implausible Signal readings then I wouldn't think it's the Thermo.

My thermo was shot and I wasn't getting fault codes - if we're being honest, it's as if the engine management thinks the engine is still cold.... To have the engine running with a dicky thermo isn't uncommon on the 1.8T. I wouldn't think the thermo would ever cause a fault code as it simply isn't (as far as the ECU is concerned) an uncommon scenario.

I'd go with one of two options for this: 1) The wiring or plug is bad - strip and check or 2) You've got a DOA temp sensor - worth taking it back for a replacement, thy should change it.
 
Also, the Ross Tech wiki page that Tuffty posted doesn't suggest that this fault is linked to a bad thermo...
 
tufftybloke said:
Thermostat....

<tuffty/>
Click to expand...

:iagree: I had the eml come on before xmas, scanned it with vag com and got the same error code.
Changed the stat, cleared the fault, now its at 90 within 5 minutes of running and sits there all day no probs.
 
ok i cleared the codes and it hasnt come bacK yet, this is a typical journey to work.....

start up car leave for ice to melt ( after a few mins still on 60)
5 miles down road shifts to just above 60
stays for the rest of journey unless you hit a traffic jam then it might go up to 90 but is rare,

i can open the engine bay and feel the water is very hot but just wont show on the temp gauge on my dash!

you think it might be worth taking the tempo sensor out and returning it to the shop and try the stat?
 
ok ill take back the temp sensor and try replacing the stat and let you know
 
zeeeebo said:
ok ill take back the temp sensor and try replacing the stat and let you know
Click to expand...

I doubt they will take it back if you have used it, personally its worth changing as a precaution as they are a common fault. Stats are less than a tenner from any decent motor factor... Don't forget to get an o-ring for the stat housing if the stat doesn't come as a kit...

<tuffty/>
 
My temp guage rarely gets to 90. I've had the dash cluster replaced (it was generally faulty anyway), had the water pump replaced with the timing belt as usual, and I asked my garage to check the thermostat. He did and it was ok, he said it is obviosuly getting up to temperature and the fan kicks in when it is getting hot. Heater comes on fine after a minute or two when starting so I would agree with this. Conclusion: in my case I reckon its the sender unit, plan to get it replaced when its serviced this year. Until then it doesn't bother me as I know the thermostat is ok and I've had a new water pump. My mechanic told me not to worry about it for now. Its been running fine for months like it so I think if I had a more serious problem I'd know by now.

Hope thats some help.
 
yer my car seems to be running fine but it just bugs me! how much was the dash display repair just out of interest?
 
i had a simular problemto this, changed the thermastat on saturday now sits at 90 degrees all day long, so i would say change the stat mate.
 
The ECU uses the temp sender to let it know when the coolant is up to temperature.... if its faulty and sending low or just plain wrong readings to the ECU, this 'will' affect the fuel consumption and performance of the car... would be less obvious on a 1.6 than a 1.8t though...

<tuffty/>
 
ok well i have ordered a thermostat kit so will let you guys know how it goes=)
 
Hi,im going to be changing my thermostat soon,ive got a new one and the G12 antifreeze but im not 100% sure where the thermostat is,any pics please to show me??..
 
i was surprised how easy it actually was to do! i got a walkthrough off the audi tt forum, maybe someone has a link on here if not ill find i twhen im back from work!
 
Yeah cool mate,ive just had a look at the tt one dude,think i know where it is now.Is there a gasket with the thermostat?,i know you have to have a o ring but doesnt say about a new gasket as most thermostats have to have a new gasket??
 
I just put the o ring on as I got gaskets with the kit but none fitted! And I was also surprised u don't loose much coolant as long as the change of the actual thermostat iquick!
 
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