Alfa Romeo Forum banner

1 - 20 of 25 Posts

·
Registered
Joined
·
47 Posts
Discussion Starter #1
Hi, i am now the proud owner of a lovely 156 selespeed. Only problem is after only doing 100 or so miles it went into safe mode on the selespeed gearbox so i only get 1/2 and reverse.:mad: After reading numurous threads on this site i went out and bought a cable and the alfadiag software. I hae read the code that is showing and it is p1742. I have searched high and low for the diagnosis of this code and cannot find it anywhere. There is another thread from a year ago but no solution. So i thought i would register and see if i could find a solution as when i have been able to drive this car what a joy it was.

I have tried various things on the alfadiag but to no avail. Any hints or tips would be greatly appreciated or if anyone has repaired this fault or knows how to i would be over the moon. Unless it means i need a new actuator:cry:

Many thanks in advance:thumbs:
 

·
Registered
Joined
·
6,274 Posts
From what I can gather, it's one of the selection range sensors on the actuator.

There are 3 iirc (black plastic things - I'll post a pic later). The electrical connections might need cleaning, or if that fails they can be found on ebay for £40 each (also try a fiat dealer though - they seem to be able to sell actuator parts, whereas AR will only sell the complete unit :rolleyes:).

You can try swapping them around to determine which is faulty, or measure their resistance with a multimeter. I forget what normal ohm-age is though... Under or around half-to one kOhm rings a bell...

If you're cleaning the electrics, do the 20-way block that connects the sele loom to the main loom as well. :thumbs:
 

·
Registered
Joined
·
135 Posts
The post and iainfm's answer basically tell the same: the sensors!

You may want to follow that road....

As iainfm told us, to get to the sensors ist simple...

Findus
 

·
Registered
Joined
·
47 Posts
Discussion Starter #6
Thanks guys, i will be giving that a try on saturday as when i finish work it is dark. I hope it works so i can have some fun again. I have never drove anything that is so much fun!!! Will post results
 

·
Registered
Joined
·
47 Posts
Discussion Starter #10
just to update, after many different tests it turns out that this fault code relates to the sensor on the rear of the accumalator, if you get a code of p1741/p1742/p1743 it is down the the three sensors. By uplugging each individual sensor it will throw different faults and then you can establish each sensor working or not working.
 

·
Registered
Joined
·
6,274 Posts
just to update, after many different tests it turns out that this fault code relates to the sensor on the rear of the accumalator, if you get a code of p1741/p1742/p1743 it is down the the three sensors. By uplugging each individual sensor it will throw different faults and then you can establish each sensor working or not working.
Good stuff. You know which one to change then! :D

The rear one's the up/down sensor, which is kinda similar to moving a normal gearstick left and right.

Try a Fiat dealer. They *might* be able to get it for you, or there's the ebay link above :thumbs:
 

·
Registered
Joined
·
47 Posts
Discussion Starter #13
thanks for that, i have just put a thread on what i have found out. The said sensor is exactly the same as a throttle position sensor for a sxo vts/106 gti 16v. So a scrappy £10 each or new £30 each. It looks like they are common. It sounds like if your selespeed goes into ''safe mode'' it is a sensor fault and if it wont engage gears it is either stuck in gear/pump/actuator. If it is skipping gears then alfadiag and calibration from what i can see. I have read so many threads this week and to be honest with you i am no longer scared as anybody is fairly confident would be able to replace these parts with the help of alfadiag.

ALFADIAG is the way to go, before anything else people need to buy a cable and this software as it will save them money in the long run and help to maintain there selespeed by doing checks/service monthly. It only takes 30mins.

Thanks for the help everyone!!!
 

·
Registered
Joined
·
6,274 Posts
thanks for that, i have just put a thread on what i have found out. The said sensor is exactly the same as a throttle position sensor for a sxo vts/106 gti 16v. So a scrappy £10 each or new £30 each.
Now THAT's useful info. And they'll fit nicely into pockets! :D

ALFADIAG is the way to go, before anything else people need to buy a cable and this software as it will save them money in the long run and help to maintain there selespeed by doing checks/service monthly. It only takes 30mins.
Couldn't agree more! :thumbs:
 

·
Registered
Joined
·
135 Posts
I've discussed this development briefly with our Selespeed guru, and his advice is caution. He says, there is a difference in reliability between Magnetti Marelli and third party sensors.

Btw: there are sensors in eper for the punto with the part number 71737620 (or 71752610 for Grande Punto) which are cheaper but it appears that all those sensors for dualogic/selespeed in eper are the same, despite the different numbers (and prices)

So given the delicacy of our beloved robotic transmission it seems (as i see it) advisable to stick to the original parts.

On the other hand, maybe it really works. If you try it, keep us posted.

Findus
 

·
Registered
Joined
·
47 Posts
Discussion Starter #16
Hi findus!! You will find that the throttle position sensor for a saxo vts/106 gti are magnetti marelli and are identical to the selespeed sensor. I know this as i went to the scrappy this morning and took one of a 106gti and fitted it. Guess what works perfect fault gone calibration done! Smile on my face like the first time a slept with a bird!! Tell a lie its actually a bigger smile!!

So for anybody out there please bear this in mind as if you get one from scrappy it costs you hardly anything, then when this cures the problem buy one brand new and you know that you are not wasting your money!!
 

·
Registered
Joined
·
135 Posts
Then its settled. And its good news.:)

Please keep us informed upon this subject (the reliability of said sensors)...

Keep up the good work

Findus
 

·
Registered
Joined
·
7,120 Posts
cheap selespeed fix shock

and a dealer would charge £1500 for a new acctuator no doubt

who said Alfas had to be expensive to run

great work

BTW pity the poor woman who provides less pleasure than a £10 scrapyard sensor.......:D
 

·
Registered
Joined
·
35 Posts
ok, just to confirm the price difference, In New Zealand I used this part number to get a quote for the local Alfa dealership (who confiremd it was the same part for the selespeed), the quote i got was nz$556+12.5%Gst..that equates to around 220pounds...not cool
 
1 - 20 of 25 Posts
Top