Hyundai C1000
LF HEV/PHEV MENU PASSWORD LF HEV/PHEV BSD 95811/21-E6000 6000 #442-DMA(AN) MENU PASSWORD DMA BSD 95811/21-4Z000 4000 #443-NC MENU PASSWORD NC BSD 95811/21-B8000 8000 Service Proced
Quick answer
For a 2016–2017 US Hyundai Sonata, C1000 appears in verified Hyundai service-bulletin material as a manual-mode menu password reference for LF HEV/PHEV BSD, not as a confirmed vehicle fault definition. Its meaning, symptoms, driving impact, charging impact, and required repair are not yet established by verified evidence.
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 C1000 mean?
For a 2016–2017 US Hyundai Sonata, C1000 appears in verified Hyundai service-bulletin material as a manual-mode menu password reference for LF HEV/PHEV BSD, not as a confirmed vehicle fault definition. Its meaning, symptoms, driving impact, charging impact, and required repair are not yet established by verified evidence.
2. Technical explanation
The verified NHTSA-hosted Hyundai manufacturer communications list “#441-LF HEV/PHEV MENU PASSWORD” with BSD part number 95811/21-E6000 and password 6000. The same material instructs technicians to perform the bulletin procedure, check for DTCs in all menus, erase any DTCs, and erase DTCs in the Blue Link system. The supplied evidence does not establish that C1000 itself identifies a component malfunction or a specific failure mode.
3. What system is affected?
LF HEV/PHEV BSD / Blue Link-related service-menu context is indicated by the bulletin excerpt. A specific affected vehicle system is not otherwise established by verified evidence.
4. How serious is this code?
Unknown. Severity is not established by verified evidence.
5. Symptoms you may notice
Not yet established by verified evidence.
6. Possible causes
Not yet established by verified evidence. A diagnostic identifier alone is not proof that a specific component has failed.
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 any accompanying warning messages before clearing it.
- Have a Hyundai dealer or qualified service provider assess the vehicle using the applicable Hyundai service information.
- Do not assume that C1000 alone confirms a hardware failure, because the verified evidence presents it as a service-menu password reference.
10. Step-by-step troubleshooting
- Confirm the vehicle is a 2016–2017 Hyundai Sonata for the stated US applicability.
- Check for additional DTCs in all available diagnostic menus, consistent with the verified bulletin excerpt.
- The bulletin excerpt directs technicians to erase DTCs after performing the applicable bulletin procedure; the underlying procedure is not included in the supplied evidence.
11. When to contact service
Contact a Hyundai dealer or qualified service provider if C1000 is present, particularly if other DTCs or warning messages are also stored. The applicable procedure and any diagnosis beyond the excerpt are not established by the supplied verified evidence.
12. What the service center may check
- Perform the applicable Hyundai bulletin service procedure.
- Check for diagnostic trouble codes in all menus.
- Erase any DTCs after the applicable procedure.
- Erase DTCs in the Blue Link system.
13. Possible repair or resolution
- A specific repair or resolution for C1000 is not yet established by verified evidence.
- The verified bulletin excerpt describes a service procedure and post-procedure DTC clearing, but does not provide the complete procedure in the supplied evidence.
14. Affected vehicles
- Hyundai Sonata · 2016–2017 · US
15. Related TSBs / service bulletins
- NHTSA Manufacturer Communication 10128596, Hyundai document 5NP-D2K8B-02, published January 3, 2018. It includes the LF HEV/PHEV BSD manual-mode password reference and directs DTC checks and clearing after the applicable service procedure.
- NHTSA Manufacturer Communication 10115696, Hyundai document 5NP-Y9Y9T-07, published June 27, 2017. It includes the same LF HEV/PHEV BSD manual-mode password reference and DTC-clearing direction.
16. Recall information
No recall relationship is established by verified evidence.
17. Official manufacturer information
Verified official sources: NHTSA-hosted Hyundai manufacturer communications 10128596 (https://static.nhtsa.gov/odi/tsbs/2018/MC-10128596-9999.pdf) and 10115696 (https://static.nhtsa.gov/odi/tsbs/2017/MC-10115696-9999.pdf). Verified applicability supplied: 2016–2017 Hyundai Sonata, US.
19. Frequently asked questions
What does Hyundai C1000 mean?
In the supplied verified Hyundai bulletin excerpts, C1000 is shown in a manual-mode password table for LF HEV/PHEV BSD: 95811/21-E6000, password 6000. A fault-specific definition is not yet established by verified evidence.
Is C1000 safe to drive with?
Not yet established by verified evidence.
Can I charge the vehicle with C1000 present?
Not yet established by verified evidence.
Does C1000 require a repair?
A specific repair requirement is not yet established by verified evidence. The verified bulletin excerpt calls for the applicable service procedure, a check for DTCs in all menus, and DTC clearing afterward.