P0121 on Your 2024 Volvo S60
When your 2024 Volvo S60 logs P0121, the ECM has caught an inconsistent throttle position sensor pattern. The voltage is within range but the signal doesn't track correctly—our detective's investigation starts at the throttle body.
The 2024 S60 continues on the SPA platform with the 2.0L Drive-E in B5 mild-hybrid (247 hp) or T8 Recharge PHEV (455 hp combined). All use direct injection and electronic throttle control. On a new vehicle, software calibration leads the suspect list.
Symptoms
- Check engine light on
- Hesitation on acceleration
- Idle roughness
- Boost transitions inconsistent
- Throttle response delayed
Probable Causes
- ECM software calibration – Volvo SPA platform refinements. Likelihood: 40%
- Carbon deposits – DI engine carbon from city driving. Likelihood: 25%
- Throttle body defect – Manufacturing quality issue. Likelihood: 20%
- Connector issue – Factory connection problem. Likelihood: 10%
- Boost system anomaly – Supercharger or wastegate (T8). Likelihood: 5%
Cost
- All repairs: $0 under warranty
- Out-of-warranty reference: Cleaning $120–$200, replacement $400–$700, software $100–$250
Volvo Dealer Service
Your 2024 S60 is fully covered under Volvo's 4-year/50,000-mile warranty. All P0121 work is at no cost via VIDA diagnostics. Take it to your Volvo dealer.
How AutoDetective AI Can Help
Upload your S60's scan data to AutoDetective for a free AI diagnosis specific to your powertrain variant.