Fault Code U1405 on 0.9 TwinAir Engine

618 Views 6 Replies 2 Participants Last post by TruEnemy, 2 mo ago

TruEnemy

Discussion Starter · 3 mo ago

Hello together,

do anybody know what the fault code U1405 stored in the engine ECU means? I don't get a describtion with AlfaOBD or MultiECUScan and it is not deletable and permanent existing. The engine runs without any problems and flashing fault lights. I enabled the speed limiter option in the proxy aligment a few days ago, but drove the car not until today with this setup. Now I disabled this option, but will drive the car tomorrow first. But I can't believe that this is the reason.

Kind regards.

Save

1 - 6 of 7 Posts

TruEnemy

Discussion Starter · #2 · 3 mo ago

TruEnemy said:
Hello together,

do anybody know what the fault code U1405 stored in the engine ECU means? I don't get a describtion with AlfaOBD or MultiECUScan and it is not deletable and permanent existing. The engine runs without any problems and flashing fault lights. I enabled the speed limiter option in the proxy aligment a few days ago, but drove the car not until today with this setup. Now I disabled this option, but will drive the car tomorrow first. But I can't believe that this is the reason.

Kind regards.

Maybe the speed limiter option was really the reason, because now I found this: U1405 FIAT Diesel - Code OBD. I will see tomorrow if it goes away after disabling the speed limiter option.

Save

TruEnemy

Discussion Starter · #3 · 3 mo ago

After driving about 150 Km, fault code is still there. Do anybody know this fault code?

Save

TruEnemy

Discussion Starter · #4 · 3 mo ago

It seems to be a communication fault between the engine ECU and the body computer ECU but I found nothing about this fault code specific for this engine in the whole internet. Should I disconnct the battery over night and look if it disappeared? Do I have to disconnect both minus and plus cable/connection on the battery for that?

Save

TruEnemy

Discussion Starter · #5 · 2 mo ago

I disconncted the battery for more than 24 hours and dmthe fault code does still exist. Has anyone an idea for this code?

Save

TruEnemy

Discussion Starter · #7 · 2 mo ago (Edited)

Thanks for your reply. Where did you get this information? Neither MES nor AlfaOBD can give any explanation to this fault code. On the internet I can only find this explanation (Serviceinformation and Błąd U1405-86 :: Fiat Klub Polska and CÓDIGO U1405 (todas las marcas) | Síntomas y Soluciones and RST DIAmini) which would corresponds to the fact that I enabled speed limiter which the car doesn't seem to have. It has only cruise control (I know I was stupid). But without exact details I can't check anything and solve it

Save

1 - 6 of 7 Posts

Top Contributors this Month