damadgeruk
A2OC Donor
I fitted a Circoli 209440040 in July 2019 to Bo, I gather others have used this unit also. Relatively straightforward as is the temperature sender assuming you don't drop the circlip.
Today I.....
- Thread starter sco
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Darpod14
Member
Maybe not that then if it had one only so recently. I have Circoli part also different number though 209660160. I’m going to change the coolant also so will wait and see ?
Birchall
Dick Chown Award 2016
Just a brief comment.
many A2 owners run around with low temperatures showing on the dash thinking that it is ok.
But the sender and or thermostat should be replaced in those circumstances. (Preferably both)
Remember (as pointed out above) that the temperature sensor is actually two separate sensors. One is used by the dash, to show the temperature on the dial. The other is used by the ECU to determine the amount of fuel to use in the mixture (more fuel is needed when it is cold)
So a dodgy sensor may go unnoticed if the dash one is fine. This can lead to poor starting when the engine is hot (because it THINKS it is cold and adds too much fuel)
If it is the thermostat that is dodgy then this leads to lower engine temperatures and poor running and excess fuel usage.
So if your temperature gauge is reading low or you have hot start issues please replace the sensor AND the thermostat. An A2 when fully warmed up should sit at 90 degrees all day long. If yours doesn’t get to 90 the please act now.
Steve B
many A2 owners run around with low temperatures showing on the dash thinking that it is ok.
But the sender and or thermostat should be replaced in those circumstances. (Preferably both)
Remember (as pointed out above) that the temperature sensor is actually two separate sensors. One is used by the dash, to show the temperature on the dial. The other is used by the ECU to determine the amount of fuel to use in the mixture (more fuel is needed when it is cold)
So a dodgy sensor may go unnoticed if the dash one is fine. This can lead to poor starting when the engine is hot (because it THINKS it is cold and adds too much fuel)
If it is the thermostat that is dodgy then this leads to lower engine temperatures and poor running and excess fuel usage.
So if your temperature gauge is reading low or you have hot start issues please replace the sensor AND the thermostat. An A2 when fully warmed up should sit at 90 degrees all day long. If yours doesn’t get to 90 the please act now.
Steve B
Very true. My A2 didn't reach 90 when I bought it, first thing I did was replace the thermostat and that fixed it.
Today I realized I might need wider tires since I only get traction at third gear. Next thing to do is raise the limit of traction control going on itself...
Darpod14
Member
So is it worth changing both sensors Steve?
I have the thermostat and a sensor (assuming it’s the top one, four pins inside, brass looking end, green colour) is the other one a different style? 2 pin? Thanks Darren
Birchall
Dick Chown Award 2016
Both sensors are included in the one sensor (hence the 4 pins)
There is a two pin sensor but that is just to control the electric fan.
A DIY job but can be messy and the clip can be a bit tricky to get in correctly.
Steve B
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A2Steve
A2OC Donor
That’s the one mate. Yes worth changing the thermostat and the coolant sensor.
audifan
A2OC Donor
Darren @Darpod14 I know you can get the thermostat and temp sensor from TPS and ECP but I would recommend you pay more and get genuine Audi ones. There has been a spate of fakes supposedly from good brands recently. Remember to top up with only the correct coolant G12, G12+, G12++ or G13 and easier to use premixed coolant rather that concentrate.
Alan_uk
A2OC Donor
Re thermostat and sensor you might like to read Spike's experiences:
His first post is the trials and tribulations of changing the thermostat (didn't fix the problem) and the following post is his trials and tribulations of changing the sensor (fixed the problem). It took him 1 hour for the sensor which cost £25 in 2005. (Spike is a seasoned expert on A2s).
I had the usual problem in 2015 of the temperature going up and down like a yo-yo. I had an independent Audi change my temperature sensor (TDi 75) and the cost was £76.
Temperature gauge woes
Four 4 years now, the temperature gauge follows the same pattern: - for the first few minutes after a coldstart, nothing happens - then it climbs, slowly but steadily till it reaches 90°C - there it stays, rock steady. Yesterday however, I was driving for quite a while already and happened...
www.a2oc.net
His first post is the trials and tribulations of changing the thermostat (didn't fix the problem) and the following post is his trials and tribulations of changing the sensor (fixed the problem). It took him 1 hour for the sensor which cost £25 in 2005. (Spike is a seasoned expert on A2s).
I had the usual problem in 2015 of the temperature going up and down like a yo-yo. I had an independent Audi change my temperature sensor (TDi 75) and the cost was £76.
Alan_uk
A2OC Donor
Today I replaced the brake sensor cable. Warning light has been on and off for about 4 years, mostly off until recently. With MOT due I thought it was time to do it. I have 2 repair cables in anticipation: a long and a short. The long one is both brake and ABS and the brake cable goes into the cabin to the bottom of the A pillar. When I learnt that needs the dash out then I went for the short one which is just the brake sensor and avoids tampering with the ABS circuit which is more safety critical:
Note that the A2 brake sensor cables are red and yellow NOT red and brown. This was sold as an Audi VW part 1J0 973 802 and currently cost £9 on the bay. I used crimped heat shrink butt connectors. Took 4 hours, twice what I was expecting.
I took photos so can do a How To . If I were to do this again I would use the long cable and cut it short inside the engine bay. Much easier to work on but it does mean joining 4 wires and not 2, one of which is the ABS. On the otherhand, joining with the short cable means splicing into the brake sensor/ABS cable and making a join inside the wheel arch which is subject to crud.
EDIT Short cable is much cheaper at less than £10 cf long combined brake/ABS cable at (I recall) c£75
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Note that the A2 brake sensor cables are red and yellow NOT red and brown. This was sold as an Audi VW part 1J0 973 802 and currently cost £9 on the bay. I used crimped heat shrink butt connectors. Took 4 hours, twice what I was expecting.
I took photos so can do a How To . If I were to do this again I would use the long cable and cut it short inside the engine bay. Much easier to work on but it does mean joining 4 wires and not 2, one of which is the ABS. On the otherhand, joining with the short cable means splicing into the brake sensor/ABS cable and making a join inside the wheel arch which is subject to crud.
EDIT Short cable is much cheaper at less than £10 cf long combined brake/ABS cable at (I recall) c£75
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Vorsprung durch Technik
A2OC Donor
How did you diagnose the problem? Did you get the abs warning up or was it a different warning?
A2Steve
A2OC Donor
Had a good day. I was contacted by an old lady who lived locally having decided to give up driving and was looking to sell her TDI. I don’t buy/sell anymore but with the same family from new, only 27k miles on the clock and 16 service stamps I really couldn’t say no to it; it’s the call we all hope for ?
depronman
A2OC Donor
That looks to be in stunning condition. Looks to be a base model car but none the less 27k miles is a real find
Petrol or diesel ?
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A2Steve
A2OC Donor
It unfortunately needs paintwork where she has scuffed a couple of the doors, but yes other than that it’s lovely. It’s a TDI and the most basic of basic spec.
A2Steve
A2OC Donor
It’s always been garaged so the colour has done well. I think it would be a shame to modify it. I’ve got black heated SE leather here but I think it would spoil it perhaps.
depronman
A2OC Donor
All depends on what you want it for -
A garage queen leave it as is other than sort out the paint work
A car to use and enjoy owning and driving then add the mods that make it feel the best it can and suit the owners needs
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damadgeruk
A2OC Donor
Looks like an import, I don't recall UK cars being supplied with non colour coded mirrors and handles (or steel wheels). Regardless, nice find.