Hyundai C1616
MDPS assy is not to be replaced. C1612, C1646 TCU signal error Check TCU and associated wiring. C1628, C1656 Instrument cluster signal error
Quick answer
Hyundai DTC C1616 is identified in verified Hyundai service communications as “CAN BUS OFF.” The specified action is to check the chassis CAN line. The full C-MDPS assembly is not to be replaced based on this code alone.
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1. What does C1616 mean?
Hyundai DTC C1616 is identified in verified Hyundai service communications as “CAN BUS OFF.” The specified action is to check the chassis CAN line. The full C-MDPS assembly is not to be replaced based on this code alone.
2. Technical explanation
C1616 is a communication-network diagnostic trouble code in the MDPS context. Hyundai’s verified service communication describes it as a CAN BUS OFF condition and directs technicians to check the chassis CAN line. A separate verified Hyundai R-MDPS repair-flowchart communication lists C1616 among connectors/wiring-related codes: check R-MDPS connectors and wiring, erase the DTC(s), re-check, and follow the recommended repair path if the code remains present.
3. What system is affected?
MDPS/C-MDPS or R-MDPS diagnostic context; chassis CAN communication line.
4. How serious is this code?
Not yet established by verified evidence.
5. Symptoms you may notice
- A warning lamp illuminated with DTC(s) present is referenced by the verified R-MDPS repair flowchart.
- Other vehicle symptoms for C1616 are not yet established by verified evidence.
6. Possible causes
- Chassis CAN line condition, as identified by Hyundai’s instruction for C1616 CAN BUS OFF.
- R-MDPS connectors or wiring condition, because the verified R-MDPS flowchart groups C1616 with connectors/wiring-related codes.
- Specific fault mechanisms or failed components are 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
- Arrange diagnosis by a qualified Hyundai service provider or similarly qualified technician.
- Provide the stored code C1616 and any accompanying DTCs to the service provider.
- Do not replace the full C-MDPS assembly solely because C1616 is present; verified Hyundai guidance states that the full C-MDPS assembly is not to be replaced for this communication-code repair path.
10. Step-by-step troubleshooting
- Check the chassis CAN line, per Hyundai guidance for C1616 CAN BUS OFF.
- For the R-MDPS flowchart context, check R-MDPS connectors and wiring.
- Erase DTC(s) and re-check, as specified in the verified R-MDPS flowchart.
- If DTC(s) remain present, follow the recommended repair path in the applicable Hyundai service information.
11. When to contact service
Service diagnosis is appropriate because Hyundai directs inspection of the chassis CAN line and, in the R-MDPS flowchart context, R-MDPS connectors and wiring. Whether service is immediately required is not yet established by verified evidence.
12. What the service center may check
- Retrieve and document all stored DTCs.
- Inspect the chassis CAN line for the C1616 CAN BUS OFF diagnostic path.
- Inspect R-MDPS connectors and wiring where the R-MDPS repair flowchart applies.
- Erase DTC(s) and verify whether C1616 returns.
- Use applicable Hyundai service information to determine the recommended repair if the DTC remains present.
13. Possible repair or resolution
- Do not replace the full C-MDPS assembly solely for C1616; Hyundai’s verified communication explicitly states that the full C-MDPS assembly is not to be replaced in this repair path.
- The exact repair after inspection is not yet established by verified evidence.
14. Affected vehicles
- Hyundai Kona · 2016–2021 · US
- Hyundai Kona · 2016–2020 · US
- Hyundai Sonata · 2016–2017 · US
- Hyundai Sonata · 2016–2021 · US
- Hyundai Sonata · 2016–2020 · US
15. Related TSBs / service bulletins
- Hyundai TSB 20-ST-001H-2, published September 9, 2020, identifies C1616 as CAN BUS OFF and directs checking the chassis CAN line. NHTSA document: MC-10180981-0001.
- Hyundai TSB 20-ST-001H-1, published August 10, 2020, identifies C1616 as CAN BUS OFF and directs checking the chassis CAN line. NHTSA document: MC-10179244-0001.
- Hyundai TSB 22-ST-001H, published January 6, 2022, lists C1616 as a connectors/wiring-related R-MDPS code and directs checking R-MDPS connectors and wiring, erasing DTCs, and re-checking. NHTSA document: MC-10207815-0001.
16. Recall information
- No recall information was supplied in the verified evidence.
17. Official manufacturer information
Verified NHTSA-hosted Hyundai manufacturer communications: https://static.nhtsa.gov/odi/tsbs/2020/MC-10180981-0001.pdf ; https://static.nhtsa.gov/odi/tsbs/2020/MC-10179244-0001.pdf ; https://static.nhtsa.gov/odi/tsbs/2022/MC-10207815-0001.pdf
19. Frequently asked questions
What does Hyundai C1616 mean?
Verified Hyundai service communications identify C1616 as “CAN BUS OFF.”
What does Hyundai direct technicians to check for C1616?
Hyundai directs technicians to check the chassis CAN line. In the R-MDPS repair-flowchart context, Hyundai also directs checking R-MDPS connectors and wiring.
Should the full C-MDPS assembly be replaced for C1616?
No. The verified Hyundai communication states that the full C-MDPS assembly is not to be replaced in this communication-code repair path.
Can I drive or charge with C1616?
Not yet established by verified evidence.