Need Urgent Help !!!!

[Adz Gti]

My mate Ian007miles check my car recently with his vagscanner due to the engine management light coming up, it came up with 17704 fault code, I got my coolent tempreture sensor changed (from vw Bosch part) and its still showing the code ? What could it be ? Someone......

[topher]

thermostat most likely, unless you've been really unlucky and bought a knackered coolant sensor. where does the needle sit on the temp gauge in the dash while you're driving?

[Adz Gti]

It sits at 90 but takes a long time to get there, and the coolent sensor was brand new only purchased it yesterday so it must be the thermostat, any idea of how much it will cost ? Cheers btw

[dan2252]

wiring could be faulty.. a mate of mine his car was showing coolant temp faults. put a new sensor in still there.. checked wiring and found a break in the wire

[tonysgti]

the code was cleared before re scanning i take it?

[Gavo1989]

thermostat most likely, unless you've been really unlucky and bought a knackered coolant sensor. where does the needle sit on the temp gauge in the dash while you're driving?

+1 id say check thermostat buddy, ive been through this and turned out to be the stat.

[Mr_Orange]

+1 Real slow to warm up is classic thermostat buddy 
If you are replacing go with the Neuspeed 82deg part:
http://www.awesome-gti.co.uk/product.php?xProd=5590

[simon_709]

The other day mine came up with a fault saying coolant temp sensor, and when I drive along the temp gauge sits right at the bottom of cold... Would this be the thermostat?

[topher]

The other day mine came up with a fault saying coolant temp sensor, and when I drive along the temp gauge sits right at the bottom of cold... Would this be the thermostat?

i'd say thats the coolant temp sensor. you'd normally get some signs of heat with a broken stat

[topher]

the code was cleared before re scanning i take it?

^this. if you dont erase codes after replacing suspect parts it will remain in the dtc memory as an intermittent fault in most cases. (although generally with the error in mapped cooling system code the fault lies with the stat unless you have other tell tale signs)