Technical Duologic gearbox problem

18turbo · Jun 7, 2026

jackwhoo said:
Don't give up just yet.
From your posts it appears now the only gearbox code you are getting is brake light switch you may be close to fix.

Thanks for that ! Doesn't help that I am working long hours ( leave home 4.20 am back home 7.30 pm minimum)
And trying to decorate the house, and the car is outside someone else's house and the weather, it all builds up !

18turbo · Jun 7, 2026

koalar said:
Brake switch sometimes come pushed in too far from new

There self adjusting, they pull out gently on a rachet

Take a look here

Brake lights on permanently! | FIAT Panda (Mk3)

In the position of the plug in the pic I’ve indicated the two pins with battery voltage. Is there a relay somewhere for the brakes?

www.fiatforum.com

Thanks for that, interesting, will have a look at that when I next get to the car

MrMagoo · Jun 7, 2026

Panda brake light switch is very easy to do, just takes minutes - twist out the old switch, pull out the plunger of the new switch, get an assistant to press the brake pedal, replace the switch, and very slowly release the brake pedal!

18turbo · Jun 8, 2026

Thank you for the advice, it's most welcome,I am going to try and fit it tonight, along with new spark plugs, and give the seats a wash with the Vax, Tuesday, after seats have dried I will take it for a drive and see if any more fault codes come up, and if the gearbox is working as it should! Fingers crossed

18turbo · Jun 9, 2026

Last night changed brake pedal switch, like MrMagoo said very easy to change, many thanks to him, didn't have time to take car for a drive, hopefully tonight, then check fault codes again, still have timing belt and water pump to change, if weather is good that's a job for Sunday if I am not working !

18turbo · Saturday at 1:28 PM

Been back to the panda took it for a good drive. Auto still not working correctly, did scan and these are the fault codes now

jackwhoo · Saturday at 2:16 PM

Ok it could be the gear position switch on the actuator, they can get oily inside and stop working correctly.
If selespeed fluid dripping out probably need new switch.

jackwhoo · Saturday at 2:17 PM

Dualogic problem - Only 2nd or N Gear! Error p1818 | FIAT Grande Punto

Hi Guys, Recently been having troubles with the dualogic on my Grande Punt0 2007 1.4. These problems were jumping out of gear and check transmission error messages. I noticed a substantial leak on the front of the unit just below the accumulator. I believe this is the "Gear Engagement Position...

www.fiatforum.com

18turbo · Saturday at 2:23 PM

jackwhoo said:
Ok it could be the gear position switch on the actuator, they can get oily inside and stop working correctly.
If selespeed fluid dripping out probably need new switch.

I don't suppose you have a photo of it do you ?

jackwhoo · Saturday at 2:31 PM

No but have found a few for you

Fiat Dualogic Transmission Position Sensor

Shop Fiat and more Sensor de Posição at Latinafy.com Introducing the Original Genuine Fiat Mopar Dualogic Transmission Position Sensor, a crucial component for ensuring your vehicle’s smooth gear shifts. This high-quality part is compatible with numerous Fiat models, including the Argo, Bravo...

latinafy.com

Its on front of actuator little higher than pump motor

18turbo · Saturday at 2:37 PM

jackwhoo said:
No but have found a few for you

Fiat Dualogic Transmission Position Sensor

Shop Fiat and more Sensor de Posição at Latinafy.com Introducing the Original Genuine Fiat Mopar Dualogic Transmission Position Sensor, a crucial component for ensuring your vehicle’s smooth gear shifts. This high-quality part is compatible with numerous Fiat models, including the Argo, Bravo...

latinafy.com

Its on front of actuator little higher than pump motor

Thank you so much for that

jackwhoo · Saturday at 2:40 PM

Magneti Marelli Selespeed CFC328 (DUALOGIC): Italian robot - The AKPPro Magazine

Electro-hydraulic robotic transmission Magneti Marelli Selespeed CFC328 DUALOGIC

akppro.ru

Helpful info for you because you are working so hard.

MrMagoo · Saturday at 6:12 PM

It's "funny" how the behaviour of the automatic changes when it's warm and you also have a P0710 code. You could have a duff temperature sensor.

jackwhoo · Saturday at 6:13 PM

MrMagoo said:
It's "funny" how the behaviour of the automatic changes when it's warm and you also have a P0710 code. You could have a duff temperature sensor.

Where is the temp sensor on the actuator?

MrMagoo · Saturday at 6:15 PM

There isn't one.

koalar · Sunday at 7:09 AM

Nothing on eper resembling a transmission fluid temperature sensor

I guess its calculated from engine sensors

Wonder what happens if you disconnect the engine coolant temperature sensor

The engine light and fans will come on, I wonder if the behaviour of the dialogic alters

18turbo · Sunday at 7:28 AM

Jackwhoo, said on previous post that it could be the diagnostic tool causing that code to come up !

jackwhoo · Sunday at 8:06 AM

Are you thinking of post28?
my thoughts are on the gear position switch sensor code

18turbo · Sunday at 8:19 AM

jackwhoo said:
Are you thinking of post28?
my thoughts are on the gear position switch sensor code

I will have a look today, I can't find one online in UK.
Can I just remove it or do I need to depressurise the system ?

jackwhoo · Sunday at 8:45 AM

Post 28 wasn't me

Yes gear position switch can just be removed no pressurised fluid behind it

Image in post 51 do not rely on part number shown the image was provided to show what it looks like not for part number.

Technical Duologic gearbox problem

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