P0121 on Your 2024 Volvo XC60
When your 2024 Volvo XC60 sets P0121, the ECM has detected that the throttle position sensor signal doesn't match expected patterns. The data is in range but the behavior is erratic—the throttle body needs investigation.
The 2024 XC60 continues on the SPA platform with the 2.0L Drive-E in B5 or B6 mild-hybrid configurations, plus the T8 Recharge PHEV. All use direct injection. On a vehicle this new, software calibration is the leading diagnostic consideration.
Symptoms
- Check engine light on
- Hesitation on acceleration
- Idle quality diminished
- Boost transitions rough
- Throttle response delayed
Probable Causes
- ECM software calibration – Volvo VIDA updates for SPA platform. Likelihood: 40%
- Carbon deposits – DI engine carbon from city driving. Likelihood: 25%
- Throttle body defect – Manufacturing quality issue. Likelihood: 20%
- Connector issue – Factory assembly problem. Likelihood: 10%
- Boost system anomaly – Supercharger or wastegate (B6/T8). Likelihood: 5%
Cost
- All repairs: $0 under warranty
- Out-of-warranty reference: Cleaning $120–$200, replacement $400–$700, software $100–$250
Volvo Dealer Has You Covered
Your 2024 XC60 is fully covered under Volvo's 4-year/50,000-mile warranty. The dealer will use VIDA for diagnostics and repairs at no cost.
How AutoDetective AI Can Help
Upload your scan data to AutoDetective for a free AI diagnosis specific to your XC60's powertrain variant.