Diagnosing P0455 on Your 2024 Chevrolet Equinox
A P0455 on your 2024 Equinox means the ECM detected a large EVAP leak. Your all-new Equinox with the 1.5L turbo is fully under GM's warranty. The gas cap is still the most common cause, but a software update may also be needed on this new platform.
Symptoms
- Check engine light with P0455
- Possible faint fuel smell
- Gas cap not clicking securely
- EVAP readiness monitor incomplete
Most Likely Causes
- Gas Cap (Very High Likelihood): Loose or not seated properly. Tighten until it clicks.
- Software Calibration (Medium Likelihood): ECM sensitivity on the new platform may need a GM TSB update.
- Vent Valve Solenoid (Medium Likelihood): Factory defect. Warranty replacement.
- Purge Solenoid (Low Likelihood): Stuck open. Warranty-covered.
- EVAP Line Fitment (Low Likelihood): Assembly issue. Warranty-covered.
What to Do
Tighten the gas cap and drive 2–3 days. If P0455 persists, visit a Chevy dealer for GDS diagnostics and smoke testing—all free under warranty.
Warranty Coverage
Your 2024 Equinox is covered by GM's 3-year/36,000-mile warranty through 2027 and the federal emissions warranty (8 years/80,000 miles) through 2032. Let the dealer handle this.
Safe to Drive?
Yes. P0455 doesn't affect the Equinox's 1.5L turbo, CVT, or any driving systems.