What P0121 Means for Your 2022 Lincoln Nautilus
A P0121 on your 2022 Lincoln Nautilus means the PCM has flagged an abnormal throttle position sensor signal. The data is within voltage range but doesn't properly track your pedal inputs—our detective has found a clue pointing to the throttle body system.
The 2022 Nautilus uses a 2.0L turbocharged four-cylinder with direct injection producing 250 hp, paired with an 8-speed automatic. This mid-size luxury crossover demands smooth, quiet throttle response. The 2.0L EcoBoost's direct injection system makes it susceptible to carbon accumulation on the throttle body.
Symptoms
- Check engine light with possible wrench icon
- Hesitation during acceleration
- Idle roughness
- Turbo boost lag
- Throttle response inconsistency
Causes Ranked
- Carbon buildup on throttle body – The 2.0L EcoBoost DI engine accumulates carbon on the throttle plate. Likelihood: 45%
- Throttle body assembly wear – Internal TPS or motor degradation. Likelihood: 25%
- PCM software update – Ford recalibrations for the Nautilus platform. Likelihood: 15%
- Wiring or connector issue – Heat-related degradation. Likelihood: 10%
- Boost or intake leak – Intercooler piping or intake boot. Likelihood: 5%
Repair Costs
- Throttle body cleaning: $100–$180 (shop) / $10–$25 (DIY)
- Throttle body replacement: $350–$600 parts and labor
- PCM update: $100–$200 (dealer)
- Wiring repair: $100–$250
Warranty
Your 2022 Nautilus should be within Lincoln's 4-year/50,000-mile comprehensive warranty depending on mileage. The 6-year/70,000-mile powertrain warranty should apply. Lincoln offers pickup and delivery for warranty service. If out of basic warranty, throttle body cleaning is moderate difficulty on the 2.0L EcoBoost.
How AutoDetective AI Can Help
AutoDetective's AI analyzes your Nautilus's 2.0L EcoBoost data against known Ford patterns. Upload your scan for a free diagnosis.