P0456 on Your All-New 2024 Equinox
Your 2024 Equinox—a complete redesign on an all-new platform—has triggered P0456, a very small EVAP leak (0.020-inch equivalent). The new Equinox runs GM's 1.5L turbo four-cylinder with a CVT. On a vehicle this new, P0456 is almost always trivial, and your full warranty means zero cost.
Symptoms
- Steady check engine light
- P0456 stored in ECM
- No performance issues
- CVT and AWD work normally
Likely Causes
- Gas Cap Seal (High Likelihood): GM uses a traditional threaded gas cap. Loose cap or debris on the seal. $0 warranty (tighten) or $10–$15 new cap.
- Vent Valve Solenoid (High Likelihood): GM's most common EVAP failure. Located near the rear of the vehicle. $0 warranty repair.
- Purge Solenoid (Medium Likelihood): Manufacturing variance on the new platform. $0 warranty.
- EVAP Connection (Medium Likelihood): Factory assembly issue. $0 warranty.
- Software Calibration (Low Likelihood): First-year platform may need ECM updates. $0 warranty flash.
What to Do
- Remove and reseat the gas cap—listen for the click
- Schedule a warranty appointment at your Chevy dealer
- Let the dealer diagnose with GDS2 tools
- Ask about TSBs for the redesigned 2024 Equinox
Cost
- Under warranty: $0
- Bumper-to-bumper through 2027
- Federal emissions through 2032
Can I Drive?
Yes. P0456 has zero effect on the Equinox's performance, AWD, CVT, or any feature.
Warranty
Your 2024 Equinox is fully covered under GM's 3yr/36k through 2027. Do not DIY—let the dealer handle it for free. First-year platforms may have extended coverage for known issues.