Coolent temperature not settling at 90

[jp_lcr]

Hi had the Gti a week now and noticed the coolant temp doesn't seem to fly up and sit at 90 deg as expected.

Is this common or sign to take to garage? It's under VW used approved warranty, cam belt was changed last week but not sure on water pump.

It's seems to be between 70 and 90 always regardless of how the cars being driven.

Grateful for and thoughts cheers.

[damoegan]

More than likely a faulty coolent temp sensor. Only about £20..

Quite comon fault across the VAG range..

[bacillus]

It could also be a faulty thermostat...

[gazbutS3]

my money is on the temp sensor

[ub7rm]

Hi had the Gti a week now and noticed the coolant temp doesn't seem to fly up and sit at 90 deg as expected.

Is this common or sign to take to garage? It's under VW used approved warranty, cam belt was changed last week but not sure on water pump.

It's seems to be between 70 and 90 always regardless of how the cars being driven.

Grateful for and thoughts cheers.

Has it been cold with you this week?  How long is your journey?  Is it an early GTI with the AXX engine?  (04 to 06 roughly)

Mine can take an hour, yes an hour, to get up to temp on cold winter days driving at steady 50 / 60 mph type speeds.  Had the sensor and thermostat changed and made no difference.  A poll on here showed it was a commonish 'feature' of the early engined cars. 

Could very well be a fault as indicated above, but the type of sensor used on the mk5 GTI engine is different to the fault prone type used on the mk4's etc so isn't really a common fault anymore.  But don't rule out that its 'normal' ... I've spent some time trying to find a solution to this as its bloody annoying in the middle of winter.  MPG doesn't seem to suffer though.  Thank christ for heated seats!

[Andy]

Oh yeah and the heated seats are awesome, wife likes em too, but funniest when took my mum out and shes thought she was having a hot flush. 
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[ub7rm]

It has been cold but done everything from 7 mile commute to work, to 200 mile 6 hours on motorway and in jams so no pattern to temp I can see.

Its a BWA engine code March 2006.

Oh yeah and the heated seats are awesome, wife likes em too, but funniest when took my mum out and shes thought she was having a hot flush. 

As bad as mine is it does get there after about 45mins - hour!  Plus as far as I can tell its the AXX engines that seem to have this issue so as said above most likely the temp sender.  Dead easy to DIY, just make sure you pull out the old O-ring when you pull the sensor out as they can stick in the hole.  And be quick when you swap them over as you loose a bit of coolant in the process.