Hi there new to the site I'm having an issue with the cars ecu put the car to 2 different garages to get the car remapped but both garages are saying that the ecu keeps coming up with fault codes and can't access the system I have plugged the car into the diagnostics computer and it says the car is in single wire mode we have tried cleaning all the connectors and have no idea if this is a common issue and an easy fix any help or advice on this would be greatly appreciated

What age and specification is your car?

I did not think Octavia Mk1 has CANBUS wiring. Single wire mode refers to CANBUS operation in my mind.

Also post has been flagged with Amundsen-help. Definitely not fitted to Mk1

Edited 22 March, 20251 yr by krisp1
Additional comment

Mk1 skoda octavia vrs 1.8t 180 bhp petrol not sure either but that's what comes up when the diagnostic is plugged in code is 01336

56 minutes ago, krisp1 said:

I did not think Octavia Mk1 has CANBUS wiring

It does.

I never realised in all my years of ownership because it was so reliable, not the case with subsequent models.

On 22/03/2025 at 09:51, sheens said:

Hi there new to the site I'm having an issue with the cars ecu put the car to 2 different garages to get the car remapped but both garages are saying that the ecu keeps coming up with fault codes and can't access the system I have plugged the car into the diagnostics computer and it says the car is in single wire mode we have tried cleaning all the connectors and have no idea if this is a common issue and an easy fix any help or advice on this would be greatly appreciated

I would be checking the battery voltage. As this can be the cause of this issue. Along with the drivers door module.

If not these issues. Then, I would be looking at a broken wire somewhere between the a pilar and the door.