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Hello and Welcome! I'm Billy and I will assist you with your inquiry. I understand that having car problems can be frustrating so please feel free to ask if any further info is needed.If you get prompted for a Premium service or a phone call, please ignore that, cause I don't think it is needed at this point.My apologies for the delay, thank you for your patience.May I know with whom I'm speaking now?
Let me know which exact engine you have, or post the license plate.
Hello Mr. Mustafa,
No phone calls needed, as mentioned earlier. This is an automated offer by the system.
I will check the details now that I have the engine.
The most common cause for such a problem would be moisture on the engine control module connector or on the ABS/ESP connector. This will cause the communication to be disrupted, causing the no start condition.
To confirm, this will need to be connected to diagnostic equipment to get the fault codes from both modules.
However, you can start by checking the connectors, make sure those have tight and clean contacts.
VW/Audi issued a bulletin to address this problem, which I will include.
Here's a copy of that bulletin in PDF:
The start stop feature is irrelevant at this point.
That's one more sign that the drive communication network is being disrupted. The fault codes will confirm.
The electronic parking brake may be a separate issue. But that can be tackled if the problem persists having fixed the main issue.
You don't necessarily need a dealership. An independent VW garage would work.
Let's see what we have on the report, hopefully they included the fault codes.
The images are clear.
This is weird. Because they saw all the communication issues which would cause a no start, and they only focused on the other problem which is the parking lock solenoid. The parking lock solenoid does need to be addressed. But that is after fixing the communication problems. The main issue here is the loss of communication, it will cause the no start, and might even cause the parking lock solenoid problem. Because this solenoid's data is transmitted via the transmission module (on the communication network).
I'm here, I was checking the reports.
So the first thing I would ask them is why did they discard all the communication faults which can cause this problem.
It's still the same, first check the connectors on the ESP and the engine modules. Then check the communication network signals.
I indicated earlier that this fault is caused by communication issues. And this is a common fault on this model. The diagnostic report confirms that we have this problem. Yet, they chose to ignore it.
I understand. And it may get to that point. This does need to be addressed.
I don't have a specific recommendation. But I believe that any decent VW/Audi garage (not necessarily dealership) should know this issue and should be able to trace and fix the problem.
Let me know how it goes, or if further assistance is needed.
The wiring will need checking and fixing.
The communication is done via two wires (twisted pair) across the modules. The first thing to check would be the connectors at the modules. If the problem persists, then the wiring will need tracing, while checking the network signal or wave form. But most commonly dirty contacts on the connectors cause such an intermittent issue.
Thank you for your trust Mr. Mustafa. Cheers.