What Does P0121 Mean on a 2022 Ford Maverick?
When P0121 shows up on your 2022 Ford Maverick, our diagnostic investigation reveals that the throttle position sensor (TPS) is sending voltage signals within the normal operating range but with a pattern the PCM considers abnormal. The sensor is talking, but the story it tells doesn't match what the computer expects from other engine data.
The 2022 Maverick—Ford's innovative compact pickup—comes with two powertrain options: a 2.5L Atkinson-cycle hybrid (191 hp combined) standard or a 2.0L EcoBoost turbocharged four-cylinder (250 hp) optional. Both use electronic throttle control with an integrated TPS, but the diagnostic approach differs between them. The hybrid's throttle body works in concert with the electric motor and eCVT, while the EcoBoost version manages turbo boost pressure and direct injection timing.
Common Symptoms to Watch For
- Check engine light or wrench light on the instrument cluster
- Hesitation during acceleration, especially from stops
- Unstable or surging idle
- Reduced power or sluggish throttle response
- On hybrid models: unusual transitions between electric and gas power
- On EcoBoost models: turbo lag feels worse than normal
Top Causes Ranked by Likelihood
- Carbon buildup on throttle body (35%) – The 2.0L EcoBoost is direct-injection only, making it more carbon-prone. The 2.5L hybrid uses port injection, which provides some intake cleaning but can still develop deposits. Cost: $150–$300 for professional cleaning.
- Throttle body assembly failure (25%) – As a first model-year vehicle, some 2022 Mavericks may have throttle body units with manufacturing variation. Internal TPS wear creates erratic voltage readings. Cost: $300–$500 for replacement with relearn.
- PCM software calibration (20%) – First-year models commonly receive software updates addressing driveability refinements. An outdated calibration may misinterpret normal TPS operation as a fault. Cost: $0 under warranty; $100–$180 otherwise.
- Wiring or connector corrosion (15%) – The throttle body harness connector can develop corrosion or loose pins, especially in humid or salt-exposure environments. Cost: $100–$250.
- Intake system leak (5%) – On the EcoBoost, a boost leak between the turbo and throttle body creates conflicting airflow data. On the hybrid, an intake gasket leak can cause similar discrepancies. Cost: $75–$250.
How Serious Is This Code?
P0121 is rated medium severity. Your Maverick should remain drivable, though you may notice reduced power or inconsistent throttle feel. Hybrid models may experience awkward power transitions between electric and gasoline modes. Plan to address this soon—within a week.
Diagnostic Path
Connect FORScan to monitor live TPS voltage. Perform a slow throttle sweep and watch for dead spots, dropouts, or sudden voltage jumps. On hybrid models, also monitor the electronic throttle motor current draw for signs of mechanical binding.
Inspect the throttle body for carbon deposits—the EcoBoost engine is more likely to have significant buildup than the hybrid's port-injected 2.5L. Check the harness connector for corrosion or loose terminals. Verify that the most current PCM software calibration is installed—critical for a first-year vehicle.
Can You Fix This Yourself?
Check your warranty status first—your 2022 Maverick's 3yr/36k coverage may still be active depending on mileage. Throttle body cleaning is a moderate DIY job on either engine. The 2.0L EcoBoost's throttle body is accessed from the top of the engine bay. After any service, a throttle relearn is required using FORScan or a dealer scan tool.
Get a Free AI Diagnosis
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