Steering Angle Sensor 00778 and HVAC errors

the_luton_man

the_luton_man

Member
United-Kingdom
I had a VCDS scan today (attached) as the ABS, Traction Control and Brake warning lights kept going on. Not always on start up, often after a few miles of driving. The Auto Electrician said Error 00778 was for the Steering Angle Sensor, showing the sub-category error 014 "Defective - Intermittent". He looked up the cost of a new Steering Angle Sensor and was equally shocked as me to see it £501 at trade price. He explained it was a relatively quick job to fit, but had to be sure the new part had the same part number and no coding errors after fitting it. He suggested seeking a second hand senor, it would be fraction of the Audi new price.

Currently no warning lights are showing and the care drives perfectly well, but the 3 warning lights could pop up and bleep at any time I suppose. Anyone had experience of this error and do I really need an expensive new part?

Also, puzzled by the Auto HVAC 01272 and 00818 errors. I forgot to ask about them, so don't know what HVAC is and whether I should be worried about getting those error codes cleared too.

I wish I was close to an Audi A2 specialist and sadly miss my friend Tony at A2 Cars in Milton Keynes.
 

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HVAC is the air con system - Climatronic (assuming you have the pushbutton electronic climate control version).

This is prone to a variety of errors due to age - sticky flaps, sensors etc. being the usual ones. Many can be cleared as spurious or intermittent, particularly if your battery has gone flat or you have experienced low voltage / alternator output shortage in cold weather etc., but others may need to be dealt with as they can cause (among other things) difficulty in adapting throttle body etc., prevention of operation of the Webasto auxiliary heater and so on, or lack or excessive cabin heat in extreme cases.

01272 is usually the centre flap V70 motor (doing a bit of searching), 00818 is the G263 evap temp sensor. Both could be an intermittent unless properly failed - try clearing them and see if they come back.

Ps - is it sensible for your VIN number and number plate to be left visible?
 
Thanks Robin, I'll get the HVAC errors looked into at the next service. I replaced the Climate Control box recently as I didn't like the look of the worn buttons. I should perhaps have paid more attention to functionality rather than cosmetics!

The Steering Angle Sensor error is higher priority, I'm online now looking up pricing of the part.
 
the_luton_man said:
Thanks Robin, I'll get the HVAC errors looked into at the next service. I replaced the Climate Control box recently as I didn't like the look of the worn buttons. I should perhaps have paid more attention to functionality rather than cosmetics!

The Steering Angle Sensor error is higher priority, I'm online now looking up pricing of the part.
Click to expand...
Evening,

I should have a spare Slip Ring/Steering Angle Sensor but it’ll be the weekend before I can get to it in the garage to test it in Project EUD prior to dispatch. I can confirm that it’s an easy item to swap but will probably require a quick calibration:

https://www.a2oc.net/community/inde...et-of-the-g85-sensor-using-vagcom-lite.32134/

This is the cheapest item currently available on eBay which may well be able to be delivered before I can get to my spares box:

www.ebay.co.uk

Audi A2 2002 Wiper Indicator Stalk SQUIB 1J0959654 for sale online | eBay

Find many great new & used options and get the best deals for Audi A2 2002 Wiper Indicator Stalk SQUIB 1J0959654 at the best online prices at eBay! Free delivery for many products!
www.ebay.co.uk

If you’re up for doing this yourself and have access to VCDS for the calibration then I’d be more the happy to remotely assist over a video call absolutely free of charge.

Kind regards,

Tom
 
A bit of info for you. The A2 either has rotary dial heater or push button digital Climate there is nothing in between. No plain a/c only as stated.
 
audifan said:
A bit of info for you. The A2 either has rotary dial heater or push button digital Climate there is nothing in between. No plain a/c only as stated.
Click to expand...
This is going to sound like a really daft question. Am I right in guessing then that the rotary version is entirely mechanical as regards the air distribution mechanism - so would not be prone to (as many) sticky flap motors and related position sensor errors etc? I only have the pushbutton version (all three cars are SEs) so I am used to the sensor and flap motor problems and related questions / error clearing efforts but not the other.
 
There are still a couple of electric motors in the rotary version but yes almost purely mechanical in operation and no compressor, evaporator, condenser , dryer etc.

This manual page explains the layout of the rotary dial heater..

Audi Workshop Manuals > A2 > Heating, ventilation, air conditioning system > Heating, air conditioning system > Heating > Heater components > Checking, removing and installing components

A2 > Audi Workshop Manuals > Heating, ventilation, air conditioning system > Heating, air conditioning system > Heating > Heater components > Checking, removing and installing components
workshop-manuals.com
 
audifan said:
A bit of info for you. The A2 either has rotary dial heater or push button digital Climate there is nothing in between. No plain a/c only as stated.
Click to expand...
Thanks, mine is a SE that's push button. Seems to work fine despite the two VCDS error codes. So I will postpone fiddling with it as I read that the 20+ year old plastics are most likely to be brittle.
 
Robin_Cox said:
HVAC is the air con system - Climatronic (assuming you have the pushbutton electronic climate control version).

This is prone to a variety of errors due to age - sticky flaps, sensors etc. being the usual ones. Many can be cleared as spurious or intermittent, particularly if your battery has gone flat or you have experienced low voltage / alternator output shortage in cold weather etc., but others may need to be dealt with as they can cause (among other things) difficulty in adapting throttle body etc., prevention of operation of the Webasto auxiliary heater and so on, or lack or excessive cabin heat in extreme cases.

01272 is usually the centre flap V70 motor (doing a bit of searching), 00818 is the G263 evap temp sensor. Both could be an intermittent unless properly failed - try clearing them and see if they come back.

Ps - is it sensible for your VIN number and number plate to be left visible?
Click to expand...
Hi Robin ... You are right, I will remove the numbers, thanks
 
2work said:
Evening,

I should have a spare Slip Ring/Steering Angle Sensor but it’ll be the weekend before I can get to it in the garage to test it in Project EUD prior to dispatch. I can confirm that it’s an easy item to swap but will probably require a quick calibration:

https://www.a2oc.net/community/inde...et-of-the-g85-sensor-using-vagcom-lite.32134/

This is the cheapest item currently available on eBay which may well be able to be delivered before I can get to my spares box:

www.ebay.co.uk

Audi A2 2002 Wiper Indicator Stalk SQUIB 1J0959654 for sale online | eBay

Find many great new & used options and get the best deals for Audi A2 2002 Wiper Indicator Stalk SQUIB 1J0959654 at the best online prices at eBay! Free delivery for many products!
www.ebay.co.uk

If you’re up for doing this yourself and have access to VCDS for the calibration then I’d be more the happy to remotely assist over a video call absolutely free of charge.

Kind regards,

Tom
Click to expand...
Hi Tom

Thanks for the link. I don't have access to VCDS so the auto electrician had to perform the diagnosis and print out the report. He said if I purchased a steering wheel angle sensor he would fit it if I left the car with him for a few hours. Apparently not a big job, just he would have to remove the old one and check the replacement matched up and could then be recoded. He left me puzzled as he wasn't sure of the actual part number so buying the correct one would be a gamble. I'm not sure if the one on my A2 1.4 SE 2002 Petrol is the same as all other A2 cars. Anyway, let me know when you have tested yours, I'd rather not trust an unknown untested old one from an auction site.
Cheers, Tom
 
the_luton_man said:
Hi Tom

Thanks for the link. I don't have access to VCDS so the auto electrician had to perform the diagnosis and print out the report. He said if I purchased a steering wheel angle sensor he would fit it if I left the car with him for a few hours. Apparently not a big job, just he would have to remove the old one and check the replacement matched up and could then be recoded. He left me puzzled as he wasn't sure of the actual part number so buying the correct one would be a gamble. I'm not sure if the one on my A2 1.4 SE 2002 Petrol is the same as all other A2 cars. Anyway, let me know when you have tested yours, I'd rather not trust an unknown untested old one from an auction site.
Cheers, Tom
Click to expand...
Just checked on the internet. Not sure if this is the part number A2 Steering Angle Sensor G85 Cancelling Slip Ring - 1J0959654AC ?
 
the_luton_man said:
Just checked on the internet. Not sure if this is the part number A2 Steering Angle Sensor G85 Cancelling Slip Ring - 1J0959654AC ?
Click to expand...
The part number is the steering angle sensor.
Not 100% sure, but when I replaced it on the TT, it seemed to be called slip ring, and steering angle sensor. It's very easy to fit, but the airbag has to come off, then the steering wheel. So, not a job to take lightly.
Mac.
 
PlasticMac said:
The part number is the steering angle sensor.
Not 100% sure, but when I replaced it on the TT, it seemed to be called slip ring, and steering angle sensor. It's very easy to fit, but the airbag has to come off, then the steering wheel. So, not a job to take lightly.
Mac.
Click to expand...
I have a spare refurbed 1J0959654AP which I ended up with when doing the TT, due to a lost in the post, which turned up eventually. No idea if AC and AP are different, or just the AP is later.
It's also often referred to as the clock spring, which only makes sense if you take it apart.
Mac.
 
the_luton_man said:
Just checked on the internet. Not sure if this is the part number A2 Steering Angle Sensor G85 Cancelling Slip Ring - 1J0959654AC ?
Click to expand...
This is indeed the correct part number for your car.

If you can live with the issue for a while, I’m happy to diagnose and fix it when I’m next in Leighton Buzzard, should that suit you.

Cheers,

Tom
 
Last edited:
That as clear as ...
Item 10 is the steering angle sensor, but the slip ring, cancelling bit, with the stalks attached is not part of the sensor.

Edit: Just seen Tom's confirmation of p/n.

There is some suggestions, (found them when mine failed), that the opto sensor gets dirty, and can be cleaned, how to here
Mac.
 
timmus said:
This is indeed the correct part number for your car.

If you can live with the issue for a while, I’m happy to diagnose and fix the issue when I’m next in Leighton Buzzard, should that suit you.

Cheers,

Tom
Click to expand...
Hi Tom

Great to hear from you. Hope all is well. I was thinking about you and whether I could get this sensor issue and the very annoying door lock microswitch cluncking noises fixed soon by you. Keep us all informed as to when you are next visiting Leighton Buzzard, I expect there's many Southerners waiting. I think last time may have been in June so that would be well ahead of my next MOT in September. I've been told the car is driveable as the Steering Wheel Angle Sensor fault is intermittent and fault lights extinguish usually when the ignition is switched off and on. Meanwhile I'll look out for a spare part.
 
the_luton_man said:
Hi Tom

Great to hear from you. Hope all is well. I was thinking about you and whether I could get this sensor issue and the very annoying door lock microswitch cluncking noises fixed soon by you. Keep us all informed as to when you are next visiting Leighton Buzzard, I expect there's many Southerners waiting. I think last time may have been in June so that would be well ahead of my next MOT in September. I've been told the car is driveable as the Steering Wheel Angle Sensor fault is intermittent and fault lights extinguish usually when the ignition is switched off and on. Meanwhile I'll look out for a spare part.
Click to expand...
Just be aware that while the steering wheel sensor is fault is active, the ESP is inoperative. It uses ABS to correct any problems, but needs the steering angle sensor to tell it what direction your moving.
Mac.
 
With a whole lot of reading up on here and much trepidation I simply had to have a go at fitting my A2 with a Steering Angle Sensor. It took me a whole morning and then I had to get a friend to help out with the VCDS as I don't have one. My car drives so much better and for now I don't worry too much about a bleeping noise and the flashing up of the ABS, Traction Control and Brake warning lights. I've driven the car a number of times for a total of around 50 miles and so far so good. I now have the old part to try to clean as a possible working spare if I ever need it (thank you @PlasticMac for pointing me in the direction of how that can be done).

I also had a go at replacing a blown driver's side dipped headlight bulb. The instructions on here as to first removing the headlight housing are excellent and made access so much easier, but before taking out the blown bulb I decided that it was best to replace the passenger side one too so they matched. So, I had a go at removing that particular headlight housing only to find to my dismay that one of the two bolts there wouldn't budge. Rather than force it and possibly then damage its head, I have put the task temporarily on hold as I scratch my own head and carry out research on the best approach. I only drive the A2 in daylight a couple of times a week so it's a job that can wait a few days.

Other than the bulbs, I have four other jobs pending on my A2 and I'd like to treat it to a full valet so that I can properly enjoy it this summer.
 
I think should find out what is causing the ABS, ESP lights, before you decide if you should worry about them. I suspect that the replacement Steering Angle Sensor has not been set up using VCDS Basic Settings, it's not just a matter of clearing the codes for the fault codes. Get the car scanned, and post the results here. With those errors the car could be dangerous to drive, and to you, the driver.
Mac.
 
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