Solving the P0446 Mystery on Your 2021 Kia Telluride
A P0446 code on your 2021 Kia Telluride means the PCM has identified an EVAP vent control circuit malfunction. Kia's flagship three-row SUV (ON platform) with the 3.8L Lambda II V6 uses a Canister Close Valve (CCV) to manage evaporative emissions. The code indicates an electrical fault in this valve's circuit.
The Telluride has been a massive success for Kia, combining premium features with their renowned warranty. At four to five years old, your 2021 model likely still has coverage for EVAP-related repairs.
Symptoms You've Noticed
- Check engine light on with P0446 stored
- Possible fuel filling difficulty — nozzle clicks off early
- EVAP system monitor not completing
- May appear alongside P0441 or P0455
Suspects Ranked
- Canister Close Valve (CCV) Failure (High Likelihood): The CCV solenoid on the Telluride is located near the charcoal canister at the rear of this large SUV. After four years, electrical failure from thermal cycling and exposure is the top cause. Parts $55–$110, labor $100–$220.
- CCV Connector Corrosion (High Likelihood): Road moisture and salt reach the CCV connector, corroding terminals. The Telluride's size means more undercarriage exposure to the elements. Repair costs $60–$155.
- Fuel Tank Pressure Sensor (FTPS) Drift (Medium Likelihood): The FTPS can drift over time, providing inaccurate data that affects vent circuit evaluation. Replacement runs $90–$235.
- Wiring Harness Damage (Medium Likelihood): The Telluride's long wheelbase means extended wiring runs from the PCM to the rear-mounted CCV. More distance means more potential for road damage. Repair costs $100–$300.
- Charcoal Canister Contamination (Low Likelihood): The Telluride's larger fuel tank increases the risk of overfilling damage to the canister. Replacement costs $170–$370.
How to Diagnose
- Scan for all stored codes and review freeze frame data
- Locate the CCV near the rear charcoal canister
- Inspect the CCV connector for corrosion and damage
- Test CCV resistance with a multimeter against Kia specs
- Command the CCV with 12V — listen for the click
- Check wiring from the CCV to the PCM for continuity
- Test the FTPS if the CCV circuit checks out
Cost Breakdown
- CCV replacement: $155–$330
- Connector repair: $60–$155
- FTPS: $90–$235
- Wiring repair: $100–$300
- Diagnostic fee: $90–$150
Can I Drive With P0446?
Yes. P0446 is an emissions circuit code. Your Telluride's 291-hp V6, 8-speed transmission, and AWD system are completely unaffected. Tow, haul, and drive normally.
Warranty Status
Your 2021 Telluride may still be within Kia's 5-year/60,000-mile basic warranty — check your mileage. The 10-year/100,000-mile powertrain warranty and 8-year/80,000-mile federal emissions warranty provide extensive coverage. A dealer visit is the smart move.