P0456 on Your 2022 Mitsubishi Eclipse Cross
A P0456 code on your 2022 Mitsubishi Eclipse Cross means the ECM has detected a very small leak (0.020-inch equivalent) in the EVAP system. The refreshed Eclipse Cross uses a 1.5L turbocharged four-cylinder and Mitsubishi's EVAP monitoring system.
Common Causes
- Gas cap seal wear (33%) — Three years of use degrades the seal.
- Purge valve seepage (24%) — The purge solenoid can develop slight internal leaks.
- EVAP line looseness (17%) — Connections loosened by heat and vibration.
- Canister vent valve issue (13%) — Vent valve wear.
- Charcoal canister damage (8%) — Road debris.
- Fuel tank seal (5%) — Slow degradation.
Diagnostic Steps
- Gas cap test — New OEM cap ($10–$22), clear code, monitor.
- Smoke test — Professional diagnosis.
- MUT-III diagnostics — Mitsubishi dealer tool.
- Component testing — Valve checks.
Repair Costs
- Gas cap: $10–$22 (DIY)
- Purge valve: $110–$250
- Canister vent valve: $120–$270
- EVAP hose repair: $70–$180
- Charcoal canister: $210–$410
Warranty
Your 2022 Eclipse Cross is covered under Mitsubishi's 5-year/60,000-mile warranty through 2027 and federal emissions for 8 years/80,000 miles through 2030.