Occasional DTC/ABS warning lights

[Alex1978]

Greetings everyone, I am seeking assistance from someone. I own a 2011, 320d M sport E90 vehicle, and recently I have been experiencing sporadic illumination of the DTC and ABS warning lights. After doing extensive study on several sites, I decided to replace the rear sensors and reluctor rings, as well as the front hubs (except the sensors). Additionally, I replaced the Yaw sensor and ultimately the ABS pump/ECU, since the diagnostics indicated an inherent defect inside the ECU pump. Regrettably, the lights are still being turned on. Today, I was informed that the diagnostic tests revealed a 'implausible' result. As a result, they proceeded to bleed my brakes once more. However, despite this, the warning lights are still on. A buddy used a diagnostic machine and found that it is displaying a 'implausible' error along with a Junction box electrical issue.
He believes that the problem is related to the electrical system rather than the mechanical components, which is why the intermittent lights persist even after replacing all the necessary parts.
Could you kindly provide any instances of successful resolution of comparable issues with your vehicles?
Thank you in advance

[Rashman4u]

Having the precise code and description would likely be helpful.

[Alex1978]

The current code I am receiving for the JBE is A6CF, which corresponds to the AUC sensor. However, I am unsure how this would cause the occasional activation of the DSC/ABS warning lights.
The first code associated with an internal malfunction in the ABS pump was 5DF5, if I recall correctly. I just installed a recon pump, but I am still seeing the same intermittent lights on the dashboard. The error message now indicates a problem with the JBE electronics and the specific code is A6CF.
Any guidance would be very appreciated and I really appreciate your time in providing a response.

[Rashman4u]

The AUC (Automatic Recirculated Air Control) feature in BMW vehicles is not responsible for the DSC (Dynamic Stability Control) concerns. It is primarily used for automatically recirculating air in the HVAC (Heating, Ventilation, and Air Conditioning) system. This information is often shown when the vehicle is scanned.

It is peculiar to have lights on without any error codes, which suggests a momentary power outage, comparable to when the ignition is turned off.

I assume that the issue may be connected to JBE (Junction Box Electronics). To diagnose the problem, I would thoroughly inspect the connections on the JBE for any indications of moisture damage. I need a circuit diagram to accurately follow the path of wires for the power supply.

[Alex1978]

Thank you. Rashman4u, as I lack technical expertise, do you suggest seeking assistance from an auto electrician?
I understand that this may seem trivial, but I am reluctant to continue spending money on purchasing and changing components when it may not be the true cause of the problem. The intermittent nature of the issue makes it difficult to accurately identify the underlying defect, so I empathize with your situation.
Thank you.

[Rashman4u]

Indeed, diagnosing intermittent issues may be rather challenging, particularly when there are no error codes to provide any indication.

If I were in your position, I would consider replacing the front fuse box/jbe with a secondhand one, since they are quite inexpensive. The fuse box may be easily installed and does not need any further configuration. However, it is important to ensure that the module component has the same part number as the one from the original automobile.

[Alex1978]

I am grateful for your suggestion. Thank you once again for your valuable input. I will search on eBay and similar platforms to find a replacement. Additionally, I will investigate the process of accessing and replacing the fusebox.

[Rashman4u]

Removing it is a straightforward task after the glovebox has been taken out.

[Alex1978]

I will begin searching on YouTube, then. Thank you, friend. 👍