What Does P0121 Mean on a 2024 Nissan Rogue?
P0121 on your 2024 Nissan Rogue sends our diagnostic investigators to the throttle position sensor (TPS). The sensor is transmitting voltage within normal bounds, but the performance pattern is abnormal—the ECM detects readings that conflict with accelerator pedal input, mass airflow data, and engine load calculations.
The 2024 Rogue uses Nissan's 1.5L VC-Turbo three-cylinder engine (201 hp) with a CVT. This innovative variable-compression engine uses direct fuel injection, which makes the throttle body more susceptible to carbon buildup compared to port-injected engines. The electronic throttle body houses an integrated TPS that cannot be replaced separately.
Common Symptoms to Watch For
- Check engine light on
- Hesitation during acceleration from stops
- Rough or surging idle
- Sluggish response during highway merging
- CVT feels unresponsive or hesitant
- ProPILOT Assist may disengage or behave erratically
Top Causes Ranked by Likelihood
- ECM software calibration (35%) – The VC-Turbo is a complex engine, and Nissan releases calibration refinements regularly. An updated version may resolve the code. Cost: $0 under warranty.
- Throttle body manufacturing defect (30%) – A factory defect in the throttle body or internal TPS element. Cost: $0 under warranty.
- Wiring or connector defect (20%) – Manufacturing variability in the harness or connector. Cost: $0 under warranty.
- Carbon buildup on throttle body (10%) – The VC-Turbo's direct injection can produce deposits even at low mileage, especially with short-trip driving. Cost: $120–$275 if not warranty-covered.
- Boost or intake leak (5%) – A turbocharged intake tract leak creating conflicting sensor data. Cost: $0 under warranty.
How Serious Is This Code?
P0121 is medium severity. Your Rogue remains drivable, but throttle response issues can make the VC-Turbo feel underpowered. Schedule a dealer visit soon—this is a warranty repair.
Diagnostic Path
Take your 2024 Rogue to a Nissan dealer. They'll use CONSULT to monitor live TPS data, verify ECM software version, and check Nissan's TSB database. The VC-Turbo's complexity means dealer diagnostics are the most efficient path.
Can You Fix This Yourself?
Your 2024 Rogue is fully covered under Nissan's 3yr/36k basic warranty and 5yr/60k powertrain warranty. Take it to the dealer—all work is free. Don't compromise warranty coverage with DIY repairs.
Get a Free AI Diagnosis
Get informed before your dealer visit. AutoDetective's free AI diagnosis can analyze your 2024 Rogue's specific symptoms for a detailed pre-appointment briefing.