P0121 on Your 2022 Acura Integra: The Detective's Report
A P0121 code on your 2022 Acura Integra means the ECM has flagged an inconsistent throttle position sensor signal. The voltage stays in range but the pattern doesn't match pedal position—like a detective who notices the clocks at the crime scene are all running but showing different times. Something in the throttle system needs attention.
The 2022 Integra revived the iconic nameplate on the Honda Civic platform, powered by a 1.5L VTEC turbocharged four-cylinder with direct injection producing 200 hp (or 200 hp with the 6-speed manual). The DI turbo engine shares its architecture with the Civic Si, and the electronic throttle body uses integrated dual TPS signals.
Symptoms
- Check engine light on
- Turbo boost feels delayed
- Hesitation during spirited acceleration
- Idle may hunt or surge slightly
- Throttle response feels less sharp than usual
Most Likely Causes
- Carbon buildup on throttle body – The 1.5L turbo DI engine is prone to carbon deposits on the throttle plate. City driving and short trips accelerate buildup. Likelihood: 45%
- ECM software calibration – As a first-year model, Honda/Acura released software updates for throttle and boost management. Likelihood: 25%
- Throttle body assembly issue – Internal TPS or motor degradation. Likelihood: 15%
- Wiring or connector problem – Corrosion or loose connection at the throttle body. Likelihood: 10%
- Intake air leak – Loose turbo piping or intercooler connection. Likelihood: 5%
Repair Costs
- Throttle body cleaning: $80–$150 (shop) / $10–$20 (DIY)
- Throttle body replacement: $300–$500 parts and labor
- ECM update: $100–$180 (dealer)
- Wiring repair: $100–$250
Warranty Coverage
Your 2022 Integra should still be within Acura's 4-year/50,000-mile basic warranty depending on mileage. If covered, let the Acura dealer handle it at no cost. If out of warranty, throttle body cleaning is a moderate DIY task—the 1.5L turbo's throttle body is accessible once you remove the intake tube. After cleaning, perform Honda's idle relearn: key ON for 10 seconds without starting, then start and idle for 10 minutes.
How AutoDetective AI Can Help
AutoDetective's AI understands the Integra's Civic-based 1.5L turbo DI engine and its carbon buildup tendencies. Upload your scan data for a free diagnosis specific to your Integra.