P0121 on Your 2022 Genesis GV70
A P0121 on your 2022 Genesis GV70 means the ECM has flagged an irregular throttle position sensor signal. The data is within voltage range but doesn't match your pedal inputs—our detective has identified a throttle body communication issue that needs attention.
The 2022 GV70 is the first year of Genesis's compact luxury SUV, powered by a 2.5L turbocharged four-cylinder (300 hp) or 3.5L twin-turbo V6 (375 hp), both with direct injection and 8-speed dual-clutch automatic. Both engines demand precise throttle control for the GV70's sport-luxury character.
Symptoms
- Check engine light on
- Hesitation during acceleration
- Idle roughness
- Turbo response feels diminished
- Sport mode throttle inconsistency
Causes Ranked
- Carbon buildup on throttle body – Both DI turbo engines are susceptible to carbon deposits. Likelihood: 40%
- ECM software update – First-year model; Genesis/Hyundai has released calibration updates for the GV70 platform. Likelihood: 25%
- Throttle body assembly issue – Internal TPS or motor wear. Likelihood: 20%
- Wiring or connector issue – Turbo engine bay heat degradation. Likelihood: 10%
- Boost system interaction – Wastegate or piping issue. Likelihood: 5%
Repair Costs
- Throttle body cleaning: $100–$180 (shop) / $10–$25 (DIY)
- Throttle body replacement: $350–$650 parts and labor
- ECM update: $100–$200 (dealer)
- Wiring repair: $100–$250
Genesis Concierge Service
Your 2022 GV70 is within Genesis's 5-year/60,000-mile basic warranty and 10-year/100,000-mile powertrain warranty. Genesis Concierge will pick up your GV70, provide a loaner, and return it repaired—all complimentary. The dealer uses Genesis GDS for diagnostics.
How AutoDetective AI Can Help
AutoDetective's AI differentiates between the GV70's 2.5T and 3.5T engines for a tailored diagnosis. Upload your scan data for free.