matthew45 Posted April 3, 2017 Share Posted April 3, 2017 I have had intermittent problems with my A5 for about a year on and off now had coil packs changed but still on and off jumps like mad and missfires but NO codes come up...Jumps all the way to until the engine is warm approx 10-15 min then absolutely fineCan anybody shed any light on this is it common problem with this A5 ??? 2009 2.0Many thanksMatthewUK Quote Link to comment Share on other sites More sharing options...
Trevor Posted April 3, 2017 Share Posted April 3, 2017 Hi Matthew....welcome to the Forum It sounds like a coolant temperature sensor or the connection to it. Worth checking the live data for the sensor and see if it fluctuates....worse case scenario, replace it to eliminate it....there not too expensive! Let us know how you get on with this problem Cheers Trevor 1 Quote Link to comment Share on other sites More sharing options...
matthew45 Posted April 4, 2017 Author Share Posted April 4, 2017 Thanks Trevor its being looked at as we speak the sensor is £45+ vat fingers crossed thanks for your advice much appreciated. Matthew 1 Quote Link to comment Share on other sites More sharing options...
matthew45 Posted April 7, 2017 Author Share Posted April 7, 2017 i also have a very annoying boot squeek, took wheel out etc but i think its down the side in boot any experience on this?? thanks matthew Quote Link to comment Share on other sites More sharing options...
matthew45 Posted April 9, 2017 Author Share Posted April 9, 2017 Hi trevor since the mentioned Temp coolant sensor was fitted i took the car about 200 miles saturday and when i stopped it leaked all the coolant out now its empty the sensor flashed up on the dash board the red temp sign and the temp gauge hit 100+ any thoughts??? thanks matt Quote Link to comment Share on other sites More sharing options...
Trevor Posted April 10, 2017 Share Posted April 10, 2017 oh dear! either the sensor wasn't fitted correctly and it's lost it's seal or similar or it's got an air lock and the coolant has belched out from the expansion tank/bottle and just needs topping up. Either way I would take it back and get them to sort it, especially if it wasn't doing it beforehand Quote Link to comment Share on other sites More sharing options...
matthew45 Posted May 2, 2017 Author Share Posted May 2, 2017 Hi Trevor The car has been ok for about a few days ive done about 300 miles in it then the other day re started it after using it earlier in day and it started spluttering again i am starting to lose my patience with this issue now.... Coil packs changed Coolant Temp sensor changed breather valve changed Any other suggestions??? Carbon build up?? Filter block Im at my wits end now i have been trying to get this car sorted and 18 mths later and about 2.5k spent... Its a 2009 A5 2.0 TFSI REG YC09 0VP Regards Matthew Quote Link to comment Share on other sites More sharing options...
Magnet Posted May 2, 2017 Share Posted May 2, 2017 Hello Mathew, Was the coolant temperature sensor a main dealer part? Kind regards, Gareth. 1 Quote Link to comment Share on other sites More sharing options...
matthew45 Posted May 2, 2017 Author Share Posted May 2, 2017 I'm not sure why? Quote Link to comment Share on other sites More sharing options...
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