Hello everyone!

This is really mystery now I have Octavia 2  and I am getting a weird problem in a day when temperature  after the start , after 15 to 30 minutes depend on " temperature" battery connecting and disconnecting this happen in day time only nothing happened in the night time so let me continue after connection lost of battery I cannot use mu horn car work for a few time but no indicator nothing worked no light nothing after 15  to 30 minutes I don't know what happened but car crash it's lost engine and it's stopped and then I have to wait so car will get cold temperature or I have to go in the shadow area and I have to wait so it back up, did not  show in my dashboard all power loss so please help me I am not getting a peoples they are not diagnosing what happening actually battery is new! thank you very much

It sounds like you have a bad earth connection somewhere which is affected by ambient+engine temperature.

 

Start by checking all earth connections in engine compartment and have it scanned for any clues to where exactly the power is being lost.

 

It could be an easy fix but difficult to find e.g. wiring connection/relay/bad solder in ECU.

 

A wiring diagram will help.

 

Good luck fixing it jaldy jaldy!

5 hours ago, MicMac said:

It sounds like you have a bad earth connection somewhere which is affected by ambient+engine temperature.

 

Start by checking all earth connections in engine compartment and have it scanned for any clues to where exactly the power is being lost.

 

It could be an easy fix but difficult to find e.g. wiring connection/relay/bad solder in ECU.

 

A wiring diagram will help.

 

Good luck fixing it jaldy jaldy!

Thank you so much I will implement what you have suggested, is caused by ECU as well because this thing was also with old ecu so I replaced with other used one after few time it's behave like old, old one was not show check engine light which is normally show when ignition on, old one was only work in night only one time when engine run much if I turned off car it's don't work I meant ecu don't work 

 

Have you tried another battery? It is not a common fault but I have had experience in hot countries of a battery either going open circuit or one cell failing short when hot.

This recent post may give you something to try (moving the relays/wiring to check for bad connection).

 

 

7 hours ago, pikpilot said:

Have you tried another battery? It is not a common fault but I have had experience in hot countries of a battery either going open circuit or one cell failing short when hot.

Yes battery is new and it was same with old battery as well :(

 

13 minutes ago, MicMac said:

This recent post may give you something to try (moving the relays/wiring to check for bad connection).

 

 

I will read it thanks 🙂