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p0456
Moderate
Kia · Sedans
EVAP System - Very Small Leak Detected
Quick Answer
Error code P0456 on your Kia Sedans means: EVAP System - Very Small Leak Detected. This is usually fixable — see the step-by-step guide below.
Affected Models
Applies to all models
VGCVBDBD-GTDL3DL3HEV6 GT 2024EV6 GT-Line 2024EV6 Light 2024EV6 Wind 2024Forte GT 2024Forte GT-Line 2024Forte LXS 2024K5 EX 2024K5 GT 2024K5 GT-Line 2024K5 LXS 2024TFJBCK
Likely Causes
  1. Tiny crack in fuel cap
  2. Small hole in EVAP hose
  3. Faulty purge control solenoid
  4. Leaking fuel tank seam
  5. Defective vent solenoid
How to Fix It
1
Replace fuel cap and retest
2
Inspect EVAP hoses under magnification
3
Perform detailed smoke test
4
Check purge solenoid operation
5
Examine all EVAP connectors
Pro Tip
This fix requires some technical knowledge. If you're unsure about any step, consider contacting support or a qualified technician.
Parts You May Need
Fuel cap
EVAP hose
Purge solenoid
Related Error Codes
P0171P0300P0420P0442P0455
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