P0121 on Your 2022 Genesis GV80
A P0121 on your 2022 Genesis GV80 tells the ECM that the throttle position sensor signal is within voltage range but following an abnormal pattern. Our detective has flagged the throttle body communication as the starting point of this investigation.
The 2022 GV80 is Genesis's flagship SUV, available with a 2.5L turbocharged four-cylinder (300 hp) or 3.5L twin-turbo V6 (375 hp), both with direct injection and 8-speed automatic. The full-size luxury SUV demands smooth, refined throttle response for its premium mission.
Symptoms
- Check engine light on
- Hesitation during acceleration, especially when loaded
- Idle roughness
- Turbo response feels diminished
- Towing response sluggish
Causes Ranked
- Carbon buildup on throttle body – Both DI engines accumulate carbon. The GV80's frequent use for towing and hauling increases engine load. Likelihood: 45%
- Throttle body assembly wear – Internal TPS or motor degradation. Likelihood: 25%
- ECM software update – Genesis calibration refinements for the GV80 platform. Likelihood: 15%
- Wiring or connector issue – Engine bay heat effects. Likelihood: 10%
- Boost system interaction – Wastegate or piping issue. Likelihood: 5%
Repair Costs
- Throttle body cleaning: $100–$200 (shop) / $10–$25 (DIY)
- Throttle body replacement: $350–$700 parts and labor
- ECM update: $100–$200 (dealer)
- Wiring repair: $100–$300
Genesis Concierge Service
Your 2022 GV80 is within Genesis's 5-year/60,000-mile basic and 10-year/100,000-mile powertrain warranties. Genesis Concierge will handle everything—pickup, loaner, repair, return. All at no cost. The dealer uses Genesis GDS for diagnostics.
How AutoDetective AI Can Help
AutoDetective's AI differentiates between the GV80's 2.5T and 3.5T engines. Upload your scan data for a free tailored diagnosis.