2024 Mitsubishi Eclipse Cross P0456 Code: EVAP Leak on Your Crossover

P0456 on Your 2024 Mitsubishi Eclipse Cross

A P0456 code on your 2024 Mitsubishi Eclipse Cross indicates the ECM has found a very small leak (0.020-inch equivalent) in the EVAP system. On a new Eclipse Cross with the 1.5L turbo, this is typically minor and warranty-covered.

Likely Causes

1. Gas cap not fully seated (35%) — Click firmly.
2. Software calibration sensitivity (24%) — Updates may adjust thresholds.
3. Factory EVAP connection variance (18%) — A fitting not fully engaged.
4. Purge or vent valve irregularity (11%) — Slightly out of spec.
5. New seal break-in (7%) — Fresh seals.
6. Transport artifact (5%) — Connection disturbed.

What to Do

1. Check the gas cap — Reinstall firmly.
2. Mitsubishi dealer visit — Full warranty, zero cost.
3. Software update and repair — Dealer handles everything.

Cost

• Under warranty: $0—covered under 5-year/60,000-mile warranty through 2029
• Gas cap (DIY): $10–$22

Warranty

Your 2024 Eclipse Cross carries Mitsubishi's 5-year/60,000-mile warranty through 2029 and federal emissions coverage for 8 years/80,000 miles through 2032.