164, 24v 1993, ECU error code 31

164Carlos · Post by **164Carlos** » Tue Sep 13, 2022 10:41 am

Hi all! Hope someone can help me!

Get this errocode from MES;

31, unknown / no power supply

Same code in wilcos software.

I delete it, but it reappear at once.

Anyone have any idea what it could be?

The car seems to run ok.

Any advice appreciated

Greetings
Karl

Alfan · Post by **Alfan** » Thu Sep 29, 2022 1:48 pm

Is this the engine ECU? Or another unit?

164Carlos · Post by **164Carlos** » Sun Oct 09, 2022 8:43 pm

Engine ECU, acc to user manual its related to injectors, but I have done all the checks on them and havent found any faults

Alfan · Post by **Alfan** » Mon Oct 10, 2022 9:00 pm

Difficult to say what would cause this, if the car is running normal. In the manual section, you can find the one for Motronic 1.7, test 'I' relates to faulty injectors or injector signals related to the ECU.

164Carlos · Post by **164Carlos** » Wed Oct 12, 2022 8:53 pm

Thanks, i will check. Its running quite rough on idle, otherwise ok., has anyone had this 31 code before?

Post by **wilco** » Sun Nov 27, 2022 3:05 pm

code 1231 = faulty injector(s)

Alfa Romeo 164 Register.com

164, 24v 1993, ECU error code 31

164, 24v 1993, ECU error code 31

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