Volkswagen U163C00
Ethernet control unit, adaptive cruise control, no communication, passive/sporadic Symptom 2494551 U164400: Ethernet control unit for digital sound package, no communication, a
Quick answer
For a 2021 Volkswagen ID.4 in the US, U163C00 is documented as: “Ethernet control unit, adaptive cruise control, no communication, passive/sporadic.” It is listed in Volkswagen Technical Service Bulletin 2064412/2 concerning irrelevant DTCs logged in various control modules.
This page separates verified manufacturer/regulator evidence from supporting material. Unsupported causes, repairs or safety conclusions are not guessed.
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1. What does U163C00 mean?
For a 2021 Volkswagen ID.4 in the US, U163C00 is documented as: “Ethernet control unit, adaptive cruise control, no communication, passive/sporadic.” It is listed in Volkswagen Technical Service Bulletin 2064412/2 concerning irrelevant DTCs logged in various control modules.
2. Technical explanation
The supplied official NHTSA-hosted Volkswagen bulletin identifies U163C00 as a no-communication diagnostic trouble code involving the Ethernet control unit for adaptive cruise control. The code status is described as passive/sporadic. The provided evidence does not establish a component failure, a wiring fault, or a required repair for this code alone.
3. What system is affected?
Ethernet communication associated with the adaptive cruise control control unit.
4. How serious is this code?
Not yet established by verified evidence.
5. Symptoms you may notice
- The official bulletin describes U163C00 as passive/sporadic.
- No driver-visible symptoms are established by the supplied verified evidence.
6. Possible causes
- The verified evidence identifies a no-communication condition for the Ethernet control unit associated with adaptive cruise control.
- A specific underlying cause is not yet established by verified evidence.
7. Can I still drive the vehicle?
Not yet established by verified evidence.
8. Can I charge the vehicle?
Not yet established by verified evidence.
9. What you can safely do
- Record the code and its status, including whether it is passive/sporadic.
- Have the vehicle evaluated by an authorized Volkswagen service provider if the code persists or if adaptive cruise control concerns are present.
- Do not attempt high-voltage-system repairs based on this communication code.
10. Step-by-step troubleshooting
- The supplied bulletin evidence establishes that U163C00 may be logged as passive/sporadic.
- Specific diagnostic steps for U163C00 are not included in the supplied verified evidence.
11. When to contact service
Contact an authorized Volkswagen service provider for diagnosis if U163C00 remains present, returns, or is accompanied by adaptive cruise control concerns.
12. What the service center may check
- Confirm the stored DTC, its status, and associated diagnostic data using approved Volkswagen diagnostic procedures.
- Further required checks are not yet established by the supplied verified evidence.
13. Possible repair or resolution
- A specific repair or resolution for U163C00 is not yet established by verified evidence.
14. Affected vehicles
- Volkswagen ID.4 · 2021 · US
15. Related TSBs / service bulletins
- Volkswagen Technical Service Bulletin Transaction No. 2064412/2, “01-21-10 - Irrelevant Diagnostic Trouble Codes (DTCs) Logged in Var...”
- NHTSA Manufacturer Communication PDF 10224843, published October 17, 2022: https://static.nhtsa.gov/odi/tsbs/2022/MC-10224843-0001.pdf
16. Recall information
- No recall information is established by the supplied verified evidence.
17. Official manufacturer information
Verified source: NHTSA-hosted Volkswagen manufacturer communication 10224843, Volkswagen TSB Transaction No. 2064412/2. Applicability supplied: 2021 Volkswagen ID.4, US.
19. Frequently asked questions
What does Volkswagen code U163C00 mean?
The supplied Volkswagen bulletin identifies it as “Ethernet control unit, adaptive cruise control, no communication, passive/sporadic.”
Does U163C00 prove that a part has failed?
No. The supplied verified evidence does not establish a failed part or a specific root cause.
Is U163C00 covered by a Volkswagen technical service bulletin?
It is listed in Volkswagen TSB Transaction No. 2064412/2, concerning irrelevant DTCs logged in various control modules.
Can I drive or charge with U163C00?
Drive and charging safety are not yet established by the supplied verified evidence.