What Does P0121 Mean on a 2024 Ford Maverick?
Our diagnostic investigation into a P0121 code on your 2024 Ford Maverick reveals the throttle position sensor (TPS) is sending voltage readings that fall within the acceptable range but display an abnormal performance pattern. The PCM detects that the TPS signal doesn't correlate properly with other engine parameters like airflow, load, and accelerator pedal position.
The 2024 Maverick continues on Ford's C2 platform with updated powertrain options: the 2.5L Atkinson-cycle hybrid (191 hp combined) and the 2.0L EcoBoost turbo-four (250 hp). Both use drive-by-wire electronic throttle control with an integrated TPS in the throttle body assembly. For 2024, Ford refined the calibrations for improved driveability, making a P0121 code on this model year particularly noteworthy.
Common Symptoms to Watch For
- Check engine light or wrench light on the dashboard
- Hesitation or stumble during acceleration
- Irregular idle speed or idle surging
- Sluggish throttle response under load
- Hybrid models: jerky gasoline-to-electric transitions
- Possible reduced power mode activation
Top Causes Ranked by Likelihood
- Throttle body manufacturing defect (30%) – On a brand-new model year, a P0121 most likely points to a factory defect in the throttle body assembly or its internal TPS element. Warranty replacement is the solution. Cost: $0 under warranty.
- PCM software calibration issue (30%) – Early production runs of updated model years can carry calibrations that are subsequently revised. A TSB-level software update may resolve the code entirely. Cost: $0 under warranty.
- Wiring or connector fault (20%) – Manufacturing or assembly defects in the harness, connector crimps, or pin seating can cause intermittent TPS signal variations. Cost: $0 under warranty.
- Carbon buildup on throttle body (15%) – Less likely at low mileage but possible on the 2.0L EcoBoost due to direct injection. Short-trip driving and extreme cold starts accelerate deposits. Cost: $150–$300 if not warranty-covered.
- Intake system air leak (5%) – A loose factory clamp or intake boot defect can cause airflow discrepancies that trigger the code. Cost: $0 under warranty.
How Serious Is This Code?
P0121 is medium severity. Your 2024 Maverick should remain operational, but throttle response may be compromised. Given this is a brand-new vehicle, there's no reason to tolerate any driveability issue. Schedule a dealer appointment soon—this should be a straightforward warranty repair.
Diagnostic Path
On a 2024 model, the first stop should be your Ford dealer. They'll connect their diagnostic system to pull TPS live data, check for related codes, and search Ford's TSB database for known issues affecting your build date. If you want to investigate first, FORScan can read TPS voltage and perform basic diagnostics.
Key clues to look for: TPS voltage dropouts during slow throttle sweeps, any mismatch between TPS and accelerator pedal position sensor readings, and whether the code is consistently reproducible or intermittent.
Can You Fix This Yourself?
Your 2024 Maverick is fully covered by Ford's 3yr/36k bumper-to-bumper warranty. Take it to the dealer—do not attempt DIY repairs on a vehicle under full warranty. Any throttle body work, software updates, or wiring repairs will be performed at no cost. Document your symptoms before the visit so the technician can reproduce the concern.
Get a Free AI Diagnosis
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