17704 code??

[spetzdude]

Evening all,

Got my car scanned today thanks to AD1.8T and broght up a 17704 code.

I have allready replaced the temp sender but the ecu light keeps returning

Im getting a slight missfires when boosting at 20PSI but not sure if thats got anything to do with it.....

What else could be the problem, could it be the thermostat??

[Nino]

I had this issue and code, I replaced both the G62 temp sensor and the termo, and mine was ok after that, I would highly rekconmend you use VAG parts thou DO NOT use euro car parts termos/sensors there crap and will break.

Also take a read of this (From ross tech)
 17704/P1296/004758 - Error in Mapped Cooling System
Possible Symptoms

    Cold start issues

Possible Causes

    Coolant Temperature Sensor (G62) faulty
    Coolant Thermostat faulty

Possible Solutions

    Check Coolant Temperature Sensor (G62)
    Check Coolant Thermostat

Special Notes

    Check the stored Freeze Frame data with this fault code. Freeze Frame information will be found in the fault code description (if the module supports it) or in Generic OBD-II if the vehicle complies with those regulations.
        Freeze Frame data stored at -40*C is generally an indication of a faulty ECT or wiring.
        Freeze Frame data stored at +140*C is generally an indication of a faulty ECT or wiring.
        Freeze Frame data stored with in the 68*C ~ 80*C range is an indication that the vehicle was close to, but not within, the cooling systems normal operation range. The Thermostat itself or Cooling system components may be at fault.

[spetzdude]

Did you change the thermostat yourself??

[AD1.8T]

Just read the how to bud looks pretty straight forward to be fair alot easier than doing it on my old zr !

[Nino]

Did you change the thermostat yourself??

Yes abit fiddly getting to the bottom bolt (be careful not to round it off) but yes I did it myself.