hanman Posted February 21, 2023 Share Posted February 21, 2023 Not much info on the internet with regards to the dreaded P1710 code failure (on our Exiga cars), which is linked to Turbine Speed Sensor 2.. My 2008 Exiga GT had this issue a few months ago. Symptoms - Massive lunge/crunch when shifting from 2nd to 3rd gear - like another car has rear ended you.. - CEL coming on - Red ATOil (high temp) light coming on The Sensor 2 issue seems to be a common occurrence across the Subaru range from this time.. Legacy/Forester forums refer to this quite abit. I can confirm that the same applies to our Exiga cars. The part can be purchased quite easily from Ebay/Amazon but the labour required to fit will cost much more unless you can do it yourself. There is no part number as the sensor needs to be spliced into the harness on top of the valve body. simply search for "Subaru Turbine Speed Sensor 2". the sensor sits on top of the valve body so it needs to be removed from the car before replacing and soldering into place. I've just had my sensor replaced by a competent local mechanic and I can confirm it 100% fixes the issue (thank god 😀 ) pics provided by the garage that did the work. Quote Link to comment Share on other sites More sharing options...
Olly Posted September 10, 2023 Share Posted September 10, 2023 Ah yes I had the same problem as that on my 2008 Exiga, I bought the sensor from eBay (after ages of searching) and managed to fit it myself. It fixed the problem but now I have "AT temp" light flashing non stop, even on cold start. I tried resetting the TCU and also cleared the old fault code (which no longer shows after 2 years). Maybe I got some oil inside the connection inside the sump where the valve body is, and it is shorting somehow. Any ideas how to fix this? Quote Link to comment Share on other sites More sharing options...
subuvuu Posted May 25 Share Posted May 25 Does it damage the car to drive like this until I get it fixed? Quote Link to comment Share on other sites More sharing options...
Ollymc Posted May 27 Share Posted May 27 Hi, i drove mine for a week with the car slamming into 2nd/3rd gear, i found it wasnt quite as bad if you go into semi auto, and use those gears as little as possible, but i imagine it wont take long to cause damage since the impact is so hard, but you can get yourself home for sure, no need to sit broken down somewhere, just replace the sensor, its not too bad once you get the valve body out. Did mine on the road outside which isnt ideal but its possible. Drain out the gearbox oil from the AT sump. Then there are around 20 bolts to remove, be fairly gentle with them, you need some gasket sealant, gearbox oil, the sensor with 3 cables attached, then you need to cut the wires from the original sensor, leave enough wire so its easy to connect up to the new one, they need to be soldered, then put shrink wrap around for electrical cables, you can buy the wire shrink wraps and you need a heat gun to shrink those on. The sensor itself is only held in by a bolt, just be very careful handling the valve body, you want to take that inside and lay it on a towel. The hard part is taking out the correct bolts. The correct bolts on the valve body have a number 8 i think on them. The ones to leave alone have an infinity symbol on them. as you take out the bolts lay them down on some cardboard in the pattern they came out. when putting the valve body back in, it is quite heavy from underneath, hold it up with your forearm while you put bolts back in. Make sure cables are tidy. the outer pan needs old mastic removed or smoothed right down. then put a bead of fresh mastic all the way around and bolt that back in. 1 Quote Link to comment Share on other sites More sharing options...
Futchai Posted October 14 Share Posted October 14 Hi Olly, I have exactly the same problem with my 2014 Exiga GT as you did - a faulty AT speed sensor which was fixed by a mechanic, but then the AT Oil Temp light keeps flashing even at cold start. May I ask did you fixed it and how? Quote Link to comment Share on other sites More sharing options...
Ollymc Posted October 14 Share Posted October 14 Hi, i never managed to fix it before selling the vehicle recently, however I suspect it may be faulty wire grounding out, inside the gearbox, I didnt want to open it again after I repaired it, so just had the light flashing the whole time, which eventually your brain ignores and you barely notice it 🙂 I also believe there might be a fix with the subaru software, I did try on that, but didnt really know what I was doing, tried to reset the gearbox ecu, restart the learning process for the gearbox, but nothing worked, the car ran absolutely fine, but for some reason the temp light just refused to go out again , im sorry i am no help on this one, hope you find a fix good luck Quote Link to comment Share on other sites More sharing options...
Futchai Posted October 14 Share Posted October 14 Thanks for your reply, Olly. So you've ruled out the possibillity that it's due to short circuit? I do like my car (and I shipped it in a long way from HK just 2 years ago) so if manageable I'd very much like to keep it. Just that with a warning light flashing I'm afraid it won't pass the up coming MOT. I'm asking my mechanic to source and replace with a new sensor and see how it goes. Any idea where I could find the correct sensor though? eBay? Quote Link to comment Share on other sites More sharing options...
Ollymc Posted October 14 Share Posted October 14 Hi mate, the AT oil temp light is not affecting the mot (at least in the uk) so nothing to worry about there, obviously with the light flashing then if your oil actually overheats you wont know, i just kept checking the level on mine and it was perfect, i didnt actually get chance to rule out a short circuit fully, so this could still be a problem, it might be that subaru can remove the flashing light, but i worried they would just want to change the whole valve body (which they do with sensor fault) i attached a screenshot of the actual sensor i ordered from eBay, had to get mine from USA, any more questions just leave a reply, let me know how you get on Quote Link to comment Share on other sites More sharing options...
El_Baggo Posted yesterday at 08:00 AM Share Posted yesterday at 08:00 AM On 9/11/2023 at 6:04 AM, Olly said: Ah yes I had the same problem as that on my 2008 Exiga, I bought the sensor from eBay (after ages of searching) and managed to fit it myself. It fixed the problem but now I have "AT temp" light flashing non stop, even on cold start. I tried resetting the TCU and also cleared the old fault code (which no longer shows after 2 years). Maybe I got some oil inside the connection inside the sump where the valve body is, and it is shorting somehow. Any ideas how to fix this? Did you ever end up figuring out the issue as I have the same issue Quote Link to comment Share on other sites More sharing options...
Ollymc Posted 22 hours ago Share Posted 22 hours ago Hello! unfortunately not, I have also sold the car now so cant investigate further, car still passed mot with light flashing but never got around to dropping the oil out again to check the wiring, my only other idea was to ask subaru if they could reset the light but never got that far, maybe an auto-electrician is the way forward? Quote Link to comment Share on other sites More sharing options...
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