P0121 on the Redesigned 2024 Lincoln Nautilus
When your 2024 Lincoln Nautilus sets P0121, the PCM has caught an inconsistent throttle position sensor signal. The voltage is within range but the pattern is off—our detective has flagged the throttle body for investigation.
The 2024 Nautilus is completely redesigned with a new 2.0L turbocharged four-cylinder producing 250 hp and a new 48-inch panoramic display. The powertrain is refined from the previous generation, but as a first-year redesign, software calibration is a primary diagnostic consideration. The DI turbo engine remains susceptible to carbon buildup.
Symptoms
- Check engine light and possible wrench icon
- Hesitation on acceleration
- Idle quality diminished
- Turbo response delayed
- Throttle inconsistency
Probable Causes
- PCM software calibration – First-year redesign, software updates expected. Likelihood: 40%
- Carbon deposits – DI turbo carbon from city driving. Likelihood: 25%
- Throttle body defect – Manufacturing quality issue on new platform. Likelihood: 20%
- Connector issue – Factory assembly problem. Likelihood: 10%
- Boost system interaction – Turbo piping or wastegate. Likelihood: 5%
Cost
- All repairs: $0 under warranty
- Out-of-warranty reference: Cleaning $100–$180, replacement $350–$600, software $100–$200
Lincoln Handles Everything
Your 2024 Nautilus is fully covered under Lincoln's 4-year/50,000-mile and 6-year/70,000-mile warranties. Lincoln's complimentary pickup and delivery makes warranty service effortless. All repairs are at no cost.
How AutoDetective AI Can Help
AutoDetective's AI is tracking early patterns on the redesigned 2024 Nautilus. Upload your scan data for a free analysis before your dealer visit.