Decoding P0121 on Your 2024 Acura Integra
When your 2024 Acura Integra throws a P0121, the ECM has detected that the throttle position sensor signal is behaving irregularly within its normal voltage range. Our detective's analysis reveals a communication mismatch between your accelerator pedal commands and the throttle body's reported position.
The 2024 Integra continues with the 1.5L VTEC turbo-four (200 hp CVT / 200 hp 6-speed manual), and now offers the Type S variant with a 2.0L VTEC turbo-four producing 320 hp. Both engines use direct injection, with the Type S sharing its engine with the Civic Type R. On a new vehicle, software calibration and manufacturing quality are the primary diagnostic focuses.
What You'll Notice
- Check engine light on
- Turbo boost may feel delayed
- Hesitation during acceleration
- Idle may feel slightly rough
- Throttle less responsive than expected
Top Causes
- ECM software calibration – Honda/Acura continues releasing updates, especially for the Type S's new-to-Integra powertrain. Likelihood: 35%
- Carbon deposits – DI turbo engines accumulate throttle body carbon quickly with city driving. Likelihood: 30%
- Throttle body defect – Manufacturing quality issue with the TPS or motor. Likelihood: 20%
- Connector issue – Factory connector not fully seated. Likelihood: 10%
- Boost piping leak – Loose intercooler or turbo connection. Likelihood: 5%
Repair Costs
- All repairs: $0 under warranty
- Out-of-warranty reference: Cleaning $80–$150, replacement $300–$550, software $100–$180
Warranty Has You Covered
Your 2024 Integra is fully covered under Acura's 4-year/50,000-mile basic warranty and 6-year/70,000-mile powertrain warranty. Take it to the Acura dealer—all work is free. The dealer will use Honda Diagnostic System to diagnose, update software, and replace parts as needed. Do not DIY on a vehicle under warranty.
How AutoDetective AI Can Help
Upload your scan data to AutoDetective for an AI-driven analysis that accounts for whether you have the base 1.5L or Type S 2.0L engine. Get a free diagnosis before heading to the dealer.