What Does P0121 Mean on a 2024 Kia Telluride?
A P0121 code on your 2024 Kia Telluride tells our investigators that the throttle position sensor (TPS) is communicating within the expected voltage range but following an abnormal pattern. The ECM detects readings inconsistent with pedal position, airflow, and engine load calculations.
The 2024 Telluride continues with the 3.8L Lambda II V6 (291 hp) and 8-speed automatic. Port injection keeps the throttle body clean. As a current-year vehicle, calibration and manufacturing issues are more likely than wear.
Common Symptoms to Watch For
- Check engine light on
- Hesitation during acceleration
- Rough or unstable idle
- Transmission shifting feels off
- AWD distribution unpredictable
- Driver assistance features may disengage
Top Causes Ranked by Likelihood
- ECM software calibration (35%) – Current-year updates. Cost: $0 under warranty.
- Throttle body manufacturing defect (30%) – Factory defect. Cost: $0 under warranty.
- Wiring or connector defect (20%) – Assembly variability. Cost: $0 under warranty.
- Carbon buildup (10%) – Unlikely at low mileage. Cost: $150–$300 if not covered.
- Intake system leak (5%) – Factory issue. Cost: $0 under warranty.
How Serious Is This Code?
P0121 is medium severity. Your flagship SUV deserves flawless operation. Warranty covers everything. Schedule service soon.
Diagnostic Path
Kia dealer with KDS diagnostics. Full warranty coverage.
Can You Fix This Yourself?
Full warranty: 5yr/60k basic + 10yr/100k powertrain. Everything is covered at the dealer.
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