P0121 on the 2024 Genesis GV70
When your 2024 Genesis GV70 triggers P0121, the ECM has detected an inconsistent throttle position sensor pattern. The voltage is in range but behaves erratically—our detective has flagged the throttle body for investigation.
The 2024 GV70 continues with the 2.5L turbo-four (300 hp) or 3.5L twin-turbo V6 (375 hp), both DI. Now refined through multiple model years, software and carbon buildup are the primary P0121 considerations.
Symptoms
- Check engine light on
- Hesitation on acceleration
- Idle roughness
- Turbo response diminished
- Sport mode inconsistency
Top Causes
- ECM software calibration – Genesis platform refinements. Likelihood: 35%
- Carbon deposits – DI turbo carbon. Likelihood: 30%
- Throttle body defect – Manufacturing issue. Likelihood: 20%
- Connector issue – Factory problem. Likelihood: 10%
- Boost anomaly – Wastegate or piping. Likelihood: 5%
Cost
- All repairs: $0 under warranty
- Out-of-warranty reference: Cleaning $100–$180, replacement $350–$650, software $100–$200
Genesis Concierge
Your 2024 GV70 is fully covered under Genesis's 5-year/60,000-mile basic and 10-year/100,000-mile powertrain warranties. Concierge valet service makes warranty repair effortless.
How AutoDetective AI Can Help
Upload your GV70's scan data to AutoDetective for a free engine-specific AI diagnosis.