Hyundai P0730
2012~17 2018~ 2011 2012~17 2011~16 2017~ 2013~14 2013~17 2018~ 2018~ 2007~12 2013~18 2013~19 2020~ 2019~ 2011~14 2015~ 2011~15 2016~ 2010~15 2016~ 2013~15 2019~ Accent (RB) Accent
Quick answer
P0730 / P073000 is identified in the supplied Hyundai service-bulletin evidence as “Gear 8 incorrect ratio.”
This page separates verified manufacturer/regulator evidence from supporting material. Unsupported causes, repairs or safety conclusions are not guessed.
Watch Videos
Relevant videos play here without leaving this diagnostic page.
No sufficiently relevant embeddable video has been accepted for this diagnostic yet.
Videos are supporting material and never override OEM or regulator evidence.
1. What does P0730 mean?
P0730 / P073000 is identified in the supplied Hyundai service-bulletin evidence as “Gear 8 incorrect ratio.”
2. Technical explanation
The verified NHTSA-hosted Hyundai manufacturer communications list P0730 / P073000 as an eighth-gear incorrect-ratio DTC. The supplied evidence also references a condition of slipping more than 200 rpm while in gear, but it does not establish that this condition is present on every vehicle that stores P0730.
3. What system is affected?
Transmission gear-ratio monitoring; the supplied evidence specifically identifies eighth gear.
4. How serious is this code?
Not yet 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
- Arrange diagnosis using Hyundai service information or a qualified service facility.
- Do not attempt high-voltage or transmission repair procedures based on this page.
10. Step-by-step troubleshooting
- Confirm the stored DTC with an appropriate diagnostic scan tool.
- Use the applicable Hyundai service-bulletin diagnostic information for the vehicle’s exact model, year, powertrain, and transmission configuration. Further diagnostic steps are not established by the supplied verified evidence.
11. When to contact service
Service need is not yet established by verified evidence. However, a qualified Hyundai service facility can verify the code and determine whether an applicable manufacturer communication applies.
12. What the service center may check
- Verify P0730 / P073000 and any accompanying DTCs.
- Confirm exact vehicle applicability before using a bulletin. The supplied applicability data identifies U.S.-market Hyundai Kona (2016–2020) and Sonata (2016–2020), while the bulletin excerpts list additional vehicle applications.
- Further service checks are not yet established by verified evidence.
13. Possible repair or resolution
- Not yet established by verified evidence.
14. Affected vehicles
- Hyundai Kona · 2016–2020 · US
- Hyundai Kona · 2016–2019 · US
- Hyundai Sonata · 2016–2020 · US
- Hyundai Sonata · 2016–2019 · US
15. Related TSBs / service bulletins
- Hyundai manufacturer communication 20-AT-001H, published January 2, 2020 and hosted by NHTSA as MC-10170899-0001. Its supplied excerpt lists P0730 / P073000 as “Gear 8 incorrect ratio.”
- Hyundai manufacturer communication 19-AT-012H, published June 4, 2019 and hosted by NHTSA as MC-10163279-9999. Its supplied excerpt lists P0730 / P073000 as “Gear 8 incorrect ratio.”
16. Recall information
No recall relationship is established by verified evidence.
17. Official manufacturer information
Verified official sources: NHTSA-hosted Hyundai communications 20-AT-001H (https://static.nhtsa.gov/odi/tsbs/2020/MC-10170899-0001.pdf) and 19-AT-012H (https://static.nhtsa.gov/odi/tsbs/2019/MC-10163279-9999.pdf). No recall information was supplied.
19. Frequently asked questions
What does Hyundai code P0730 mean?
The supplied official Hyundai bulletin excerpts define P0730 / P073000 as “Gear 8 incorrect ratio.”
Which vehicles are identified in the supplied applicability data?
The supplied applicability data identifies U.S.-market Hyundai Kona model years 2016–2020 and Sonata model years 2016–2020. Exact applicability should be confirmed against the vehicle configuration and bulletin.
Is it safe to drive with P0730?
Not yet established by verified evidence.
Can an EV or plug-in vehicle be charged with P0730 present?
Not yet established by verified evidence.