P0121 on the 2024 Genesis GV80
When your 2024 Genesis GV80 triggers P0121, the ECM has detected that the throttle position sensor signal doesn't follow expected patterns. The voltage is in range but the behavior is inconsistent—our detective's investigation focuses on the electronic throttle body.
The 2024 GV80 offers a refreshed lineup with the 2.5L turbo-four (300 hp) or 3.5L twin-turbo V6 (375 hp), both DI. The 2024 model benefits from accumulated software refinements, making a true P0121 worth prompt investigation.
Symptoms
- Check engine light on
- Hesitation on acceleration
- Idle roughness
- Turbo diminished
- Throttle response inconsistent
Probable Causes
- ECM software calibration – Ongoing Genesis platform refinements. Likelihood: 35%
- Carbon deposits – DI turbo carbon from city driving. 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–$200, replacement $350–$700, software $100–$200
Genesis Concierge
Your 2024 GV80 is fully covered under Genesis's 5-year/60,000-mile and 10-year/100,000-mile warranties. Concierge service makes repairs effortless—pickup, loaner, repair, return, all complimentary.
How AutoDetective AI Can Help
Upload your GV80's scan data to AutoDetective for a free AI analysis specific to your engine variant.