Tracking Down P0441 in Your 2024 Buick Enclave
Your 2024 Buick Enclave — the refreshed model on GM's C1XX platform with the 2.5-liter turbocharged four-cylinder (328 hp) — has triggered P0441 for incorrect EVAP purge flow. The 2024 Enclave received a significant refresh with a new turbocharged engine replacing the previous 3.6L V6, along with updated styling and technology. P0441 means the ECM detected abnormal fuel vapor purge flow during its periodic self-test.
Symptoms You Might Notice
- Steady check engine light
- Normal 2.5T engine power
- AWD (if equipped) working properly
- Possible subtle fuel odor
- Emissions test failure
Common Causes — Ranked
1. ECM Software Calibration
The 2024 Enclave features a new 2.5-liter turbocharged engine — first year with this powertrain. New engine calibrations may have EVAP monitoring thresholds that need refinement. A GM ECM update or recalibration could resolve P0441 without hardware replacement.
2. Vent Valve Solenoid
GM's perennial EVAP weak spot. On the C1XX platform, the vent valve solenoid near the spare tire area is exposed to road debris and moisture. Even on a new vehicle, contamination from road conditions can affect this component.
3. Purge Solenoid Valve
The purge solenoid manages vapor flow from the canister to the new 2.5T engine's intake manifold. The turbocharged engine's different vacuum characteristics compared to the previous V6 may affect purge valve operation.
4. First-Year Powertrain Integration
As the first year of the 2.5T engine in the Enclave, integration between the new engine management and existing EVAP hardware could have calibration gaps that trigger false P0441 codes.
Diagnostic Steps
- Verify gas cap engagement
- Take to Buick dealer for GDS2 diagnostic scan
- Check for ECM software updates and TSBs for 2024 Enclave
- Vent valve solenoid test
- Purge solenoid test
Repair Cost Breakdown
- All repairs: $0 under warranty
- ECM software update (retail): $0 – $150
- Vent valve solenoid (retail): $120 – $260
- Purge solenoid (retail): $110 – $240
Can I Drive With P0441?
Yes. Your Enclave's new turbocharged engine, AWD, and all features work normally. P0441 is emissions-only.
Warranty Coverage
Your 2024 Enclave is within Buick's 3-year/36,000-mile basic warranty and 5-year/60,000-mile powertrain warranty. Take it to your Buick dealer — this should be a fully covered repair. Given the new 2.5T engine, the dealer may have specific TSBs or software updates to address P0441. Federal emissions warranty (8 years/80,000 miles) provides long-term EVAP coverage.