P0456 on Your 2024 WRX: Quick Investigation
Your 2024 WRX (VB generation) has flagged P0456—a very small EVAP leak. The 2.4L turbo Boxer (FA24) 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 performance or boost issues
- Gas cap may not be fully tightened
Suspects
- Gas Cap Not Seated (High Likelihood): Most common on newer vehicles. $0.
- Purge Control Solenoid Valve (Medium Likelihood): Manufacturing variance. $0 warranty.
- Software Calibration (Low Likelihood): Detection sensitivity. $0 warranty update.
- Aftermarket Modification (Low Likelihood): If modified—verify EVAP connections. Varies.
What to Do
- Reseat gas cap—tighten until it clicks
- If modified, check all EVAP hose connections
- If stock, dealer appointment—covered through 2027
- Free warranty repair
Cost
- Under warranty (stock): $0
- 3yr/36k through 2027
- Federal emissions through 2032
Can I Drive?
Yes. P0456 has zero impact on the turbo Boxer, boost, AWD, or performance.
Warranty
Subaru's 3yr/36k through 2027. 5yr/60k powertrain. Federal emissions 8yr/80k through 2032. Note: aftermarket modifications may complicate warranty claims.