Hyundai P0729
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
For Hyundai, verified manufacturer communications identify DTC P0729/P072900 as “Gear 6 incorrect ratio.” The cited procedure concerns transaxle clutch slipping more than 200 rpm while in gear.
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 P0729 mean?
For Hyundai, verified manufacturer communications identify DTC P0729/P072900 as “Gear 6 incorrect ratio.” The cited procedure concerns transaxle clutch slipping more than 200 rpm while in gear.
2. Technical explanation
Hyundai manufacturer communications 19-AT-012H and 20-AT-001H list P0729/P072900 among incorrect-ratio DTCs and define it as Gear 6 incorrect ratio. Their evidence summary states that these incorrect-ratio DTCs involve transaxle clutch slipping more than 200 rpm in gear. The supplied evidence does not establish a more specific component-level cause for P0729.
3. What system is affected?
Transaxle, based on the official Hyundai communications.
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
- The verified communications associate P0729 with an incorrect Gear 6 ratio and transaxle clutch slipping more than 200 rpm in gear. 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
- Arrange professional diagnosis using the applicable Hyundai service information.
- Do not attempt transaxle repair based solely on this code.
10. Step-by-step troubleshooting
- Confirm the stored DTC is P0729 or P072900.
- Have a qualified service facility diagnose the transaxle using the applicable Hyundai procedure. Further diagnostic steps are not included in the supplied verified evidence.
11. When to contact service
A qualified Hyundai service facility should diagnose the transaxle. The supplied official communications concern transaxle repair procedures for incorrect-ratio DTCs.
12. What the service center may check
- Verify P0729/P072900 is present.
- Evaluate the transaxle under the applicable Hyundai service procedure. Specific checks are not established by the supplied evidence.
13. Possible repair or resolution
- The cited Hyundai communications address transaxle repair for incorrect-ratio DTCs, including P0729/P072900. The exact repair required for an individual vehicle is not established by the supplied 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 TSB 19-AT-012H, published June 4, 2019: lists P0729/P072900 as Gear 6 incorrect ratio within a transaxle incorrect-ratio DTC repair procedure.
- Hyundai TSB 20-AT-001H, published January 2, 2020: lists P0729/P072900 as Gear 6 incorrect ratio within a transaxle incorrect-ratio DTC repair procedure.
16. Recall information
No recall relationship is established by verified evidence.
17. Official manufacturer information
Official NHTSA-hosted Hyundai manufacturer communications: 19-AT-012H (https://static.nhtsa.gov/odi/tsbs/2019/MC-10163279-9999.pdf) and 20-AT-001H (https://static.nhtsa.gov/odi/tsbs/2020/MC-10170899-0001.pdf).
19. Frequently asked questions
What does Hyundai code P0729 mean?
Verified Hyundai manufacturer communications define P0729/P072900 as “Gear 6 incorrect ratio.”
What condition do the cited Hyundai communications associate with P0729?
They describe incorrect-ratio DTCs as transaxle clutch slipping more than 200 rpm in gear.
Is P0729 confirmed to apply to a Hyundai Kona or Sonata?
The supplied applicability data lists US-market Hyundai Kona and Sonata model years 2016–2019 and 2016–2020. However, the supplied TSB evidence summary does not independently confirm those specific models; exact applicability should be verified by VIN and the full Hyundai bulletin.
Is it safe to drive or charge with P0729?
Not yet established by verified evidence.