Skoda Octavia electrics problem

[graeme.a.robson]

Hi there,

Does anyone have any idea or experience of a problem we have noticed with our 2015 Skoda Octavia. It has been the most reliable car we’ve had so a surprise that anything has gone wrong in eight years of ownership!

There is nothing wrong with the drive ability, but a bizarre set of issues:
Car:
1) central locking clicks on and off whenever we hit 10mph (either accelerating or decelerating)
2) drivers door randomly locks and can’t be unlocked (from inside or out), so we have to exit via the passenger door!
3) All windows randomly open part way
4) can’t seem to get the cabin lights to work when door opens

As there intermittent we can’t be sure they all started to happen at the same time, but they were all pretty much a 2025 problem.

Any advice greatly appreciated!

Best,Graeme

[normalbloke]

Drivers door loom? Some Skoda of that era had issues where the loom passes from the B pillar to the door. There are specific repair kits for the affected cars, and not sure if your car is susceptible or not.

[journeymanpro]

Classic door loom issues, pull the rubber gaitors back and you're sure to see broken wires.

[paddy1970]

This cluster of electrical issues all affecting your 2015 Skoda Octavia's door locks, windows, and interior lights strongly suggests a problem with the Body Control Module (BCM) or a wiring/grounding fault rather than multiple separate failures. The fact that they're intermittent and started around the same time points to either a failing BCM that controls all these systems, a corroded wiring harness (especially in the driver's door where wires flex and can break or get water damage), or possibly voltage issues from a weak battery or alternator causing erratic electronic behavior. The 10mph trigger for the central locking problem is particularly telling, as it suggests the speed-sensing auto-lock system might be involved...

[normalbloke]

paddy1970 said:

This cluster of electrical issues all affecting your 2015 Skoda Octavia's door locks, windows, and interior lights strongly suggests a problem with the Body Control Module (BCM) or a wiring/grounding fault rather than multiple separate failures. The fact that they're intermittent and started around the same time points to either a failing BCM that controls all these systems, a corroded wiring harness (especially in the driver's door where wires flex and can break or get water damage), or possibly voltage issues from a weak battery or alternator causing erratic electronic behavior. The 10mph trigger for the central locking problem is particularly telling, as it suggests the speed-sensing auto-lock system might be involved...

But what do you think?….

[journeymanpro]

normalbloke said:

But what do you think? .

As AI as it gets.

[E-bmw]

journeymanpro said:

normalbloke said:

But what do you think? .

As AI as it gets.

My thoughts also.

[chris1roll]

paddy1970 said:

This cluster of electrical issues all affecting your 2015 Skoda Octavia's door locks, windows, and interior lights strongly suggests a problem with the Body Control Module (BCM) or a wiring/grounding fault rather than multiple separate failures. The fact that they're intermittent and started around the same time points to either a failing BCM that controls all these systems, a corroded wiring harness (especially in the driver's door where wires flex and can break or get water damage), or possibly voltage issues from a weak battery or alternator causing erratic electronic behavior. The 10mph trigger for the central locking problem is particularly telling, as it suggests the speed-sensing auto-lock system might be involved...

fking AI.