P0456 on Your 2024 Impreza: A Quick Case
Your 2024 Impreza (6th generation—hatchback only redesign) has flagged P0456—a very small EVAP leak. The 2.0L Boxer with Symmetrical AWD uses a standard EVAP system. Nearly new and fully covered under Subaru's 3yr/36k warranty through 2027.
Clues
- Check engine light on
- P0456 stored
- No drivability issues
- Gas cap may not be fully tightened
Suspects
- Gas Cap Not Seated (High Likelihood): Most common on new vehicles. $0.
- Purge Control Solenoid Valve (Medium Likelihood): Manufacturing variance. $0 warranty.
- Software Calibration (Low Likelihood): First-year redesign sensitivity. $0 warranty update.
- EVAP Line Fitting (Low Likelihood): Factory connection. $0 warranty.
What to Do
- Reseat gas cap—tighten until it clicks
- If light persists, dealer appointment—covered through 2027
- Ask about first-year TSBs for the new platform
Cost
- Under warranty: $0
- 3yr/36k through 2027
- Federal emissions through 2032
Can I Drive?
Yes. P0456 has zero impact on the Boxer engine, AWD, or EyeSight.
Warranty
Subaru's 3yr/36k through 2027. 5yr/60k powertrain. Federal emissions 8yr/80k through 2032. First-year redesign—dealer may have calibration updates.